Never
by Jeff
Image text: I'll never forget you--at least, the parts of you that were important red flags.
Wow, this is a little deep for a Friday. But, let me see if I can decode this. Cueball is mulling over a previous relationship in which he had something so special, he will never have something that special with anyone else.
However, the image text gives us another angle on the story in which the previous partner had important "red flags". "Red Flags" is a phrase used to describe problems or warnings about the person that they would not be a good fit for a serious relationship or marriage. Red flags include (depending on the person) no job, history of cheating or violence, etc.
Cueball indicates he will never forget this mysterious previous person because of their important red flags that must have doomed the relationship.
Well, now I'm sad.
Everything
by Jeff
Image text: I wanna hold your hand so I don't fall out of your gyrocopter.
In this comic, the first three sentences are a bunch of statements that you would find in a birthday or anniversary card from one person in a relationship to another. In this case, all the statements are in the negative. However, by the last frame, a positive greeting card statement is used, but is continued below, which makes it less of a greeting card statement and more match up with what is going on in the background.
In the background, Cueball is gathering a lot of different sort of random things, including a crane, what appears to be a bomb and the top of a manikin. He takes two more piles of stuff and creates some sort of super tank with huge wheels, a mounted gun, satellite dish and crane. It appears to be running as there is exhaust coming out of the top of the machine.
In the image text, a gyrocopter is a very small ultralight helicopter.
UPDATE: Thanks to the commentors, I missed the outline of a female character on the tank in the last frame. So take what I've said up there and reverse it. Cueball is the character speaking, not some separate 3rd party about Cueball.
Depth Perception
by Jeff
Image text: I've looked at clouds from both sides now.
This comic is very self explanatory as it explains what he is doing every step of the way. This is one of those xkcd's that is all about emotion and feeling for both Cueball and the reader.
Ancient stargazers though the sky was simply a domed ceiling like the 2rd frame on the top line.
In the first frame of the 2nd line, Cueball puts HD webcams on the tops of football uprights, so "hundreds of feet" apart would be 120 yards apart exactly.
Guest Week: David Troupes (Buttercup Festival)
by Jeff
Image text: Guest comic by David Troupes of Buttercup Festival, who is living in that lovely tree outside your window.
Wow, a Tuesday comic? I'm thrown off, that's why this is so late. Was not expecting that. But, I guess with "Guest Week" anything can happen.
This one from David Troupes of Buttercup Festival, which can be found here.
Pretty straight forward, Cueball and Cutie sitting on the moon and she says that she has never been so happy. But, then she stops herself. Once she pegs her old high school nemesis with a rock (moon rock?!), then she can truthfully say "I've never been so happy."
Guest Week: Jeph Jacques (Questionable Content)
by Jeff
Image text: Guest comic by Jeph Jacques of Questionable Content, whose internal monologue hasn't been speaking to him for the past three years.
In this comic, completed by the artist of webcomic Questionable Content, Cueball's intenal monologue characters decide they have had enough of his dreaming and whining and decide to leave him.
Mutual
by Jeff
Image text: A universe that needed someone to observe it in order to collapse it into existence would be a pretty sorry universe indeed.
In this comic (a rare one without text in the comic portion) both characters are thinking about each other. However, because it is xkcd it is not that simple because one could be thinking about the other thinking about them. Ok, let's see if I can make that clearer. Potentially, Cueball is thinking about the possibility that Cutie (or Megan 
) is thinking about him. Or it could be the opposite way around. Or both.
And the image text adds another layer to the comic. The text is a reference to quantum mechanics and Schrodinger's cat which both say roughly that something may or may not exist (or in the case of Schrodinger's cat - may or may not be alive) until we observe it. In this comic, there are two universe, one with Megan and one with Cueball. Both are separate, but both are thinking of each other, but not observing (or seeing) each other. One could think that they are a great distance apart. In the comic, both characters look extremely sad, since they are not observing each other, merely thinking about each other.
That's what I get from the comic. This looks to be one of those that is open to interpretation. What do you get? Let's hear it in the comments.
Diode
by Jeff
Image text: And the worst part is you won't apologize.
A diode is the center of this comic and a diode is an electrical device that passes electrical current in only one direction. In this comic, the diode only passes an "I'm sorry" in one direction.
If Cueball wants to get a sorry from Cutie, they should switch ends of the diode. Problem solved!
Connected
by Jeff
Image text: Or love in general, for that matter. It just leads to the idea that either your love is pure, perfect, and eternal, and you are storybook-compatible in every way with no problems, or you're LYING when you say 'I love you'.
This is another one of those xkcd's that I classify as "emo". Each and everyone one is cynical about love and its effects. Since there is nothing to explain here, besides Young Cueball and Young Cutie sitting around talking about their musical tastes. Cuties is sitting on a rock for some reason.
I'll wait for the next comic that makes a joke about Lord of the Rings and wormholes or something.
Phobia
by Jeff
Image text: Oh God, the tornado picked up snakes!
This is one of those xkcd's that's super emo. These are always a little awkward for me to read.
However, my interpretation of the second frame is that the black haired character is speaking in reference to relationships and dating and the like. She keeps turning away potential suitors with her phrase.
I don't think she keeps saying that every year to keep from becoming a storm chaser.
What's your interpretation of this Friday's emo xkcd? Who is emotional about what to whom?
Six Months
by submission
Image text: But then she does that thing with her tongue and I remember why I left you.
This submission is from Aaron Hill. Aaron lives in the finger lakes region of NY, where he works as a web developer in higher ed. He has a blag (http://blog.amhill.net) and is on the twitter (@aaronmhill).
Cueball is waxing poetic about the six months since his breakup with "you", an unnamed, off-frame, individual.
In particular, he has been having dreams about his lost love, and during those dreams, he realizes in the back of his mind that it just feels wrong and rejects that ephemeral reality. The punchline is when he says that dealing with the loss "would be so much easier if [her] mom didn't look so much like [her]", implying that he is currently sleeping with her mom.
And according to the image text, apparently her mom does something annoying with her tongue.
(ed note: I also think it is possible that "she" who does something with her tongue is his new girl, who does something sexy with her tongue. The new girl is also possibly the first girl's mom. Not quite sure who is who in this comic.)