Who cares about his GF. If you two love each other then go for it.
if you don't say anything the pain and regret will only grow
you'll sit there wondering what if..
I don't know, I got the impression from "why, all I did was annoy you" meant that there was no reason for me to feel this way, as he kept annoying me :s
maybe he's not too sure about he should reply to that, or if he feels the same way as you do, maybe he doesn't know whether to tell you or not because he has a girlfriend?
Im in your situation, without the kissing.
Why did you break up before?
uh, I don't think that you should text him again unless he replies.
edit: oh wait, did he say you have nothing to be sorry about?