I think this song is about a relationship where it seems that both know it is going to end, and at first Tom sings as if he's savoring the moments that are left and that he wants to leave it at that, but at the end of the second verse he says "Let's start this again for real" so I believe that he is saying that despite their differences he is willing to give their relationship another chance. This is echoed when he repeats the refrain twice, with more intensity the second time, before moving on to the chorus. Well, that's just how I see it. I love this song because blink-182 is really just playing around with musical ingredients from the '80s, like the ultra-fast tambourine in the chorus (it says in the album insert that they're tambourines so don't tell me it's a cymbal).