Was he using me?

Ummm... guys can be stupid. I think you should keep your promise, because there's a good chance that what he did was kind of a mistake (I don't want to use that word because it makes it sound like it wasn't his fault,) but maybe what he did was something he regrets now, there's no point in condemning him forever for it. Some might disagree, but I would rather forgive and keep on getting hurt than hold a grudge and hurt myself. There will always be better people to comfort you, if he turns out to be a real dick, and I'd put your real trust in them. But there had to be a reason you guys were friends before, so I'd think of that.

But he needs to grow up before he can even think of flirting again. I mean, there are even some divorced couples who can still make sexual comments and flirt, because they've grown up and moved past the things that made them not right for each other.

So, long story short, make sure that you're still friends, but also make sure he knows it won't go anywhere else the way he's acting.

Ummm that is a damn good question I think that I might know how to answer but that is complicated umm k this is what I think.
He still likes you somehow he has some sort of friends that he does not want to look like a fool in front of for you or what not... (don't take this literally) he does have real feelings for you but he is scared to show them and all he thinks that you might not be there for him when he needs you most and when he was getting with yo physically umm if no one else was there that might have been him trying to be compassionate and sensitive without girlfriend and buddies around ... he is trying to be like a tough man but he cannot around you and being friends well I don't have anything to say to that because that is your guys decision and all!!

You pretty much got it right...asshole trying to have the best of two worlds. Having a gf, and having something on the side. Dump him, and move on for sure!

If he had been bailing on you, maybe he was seeing the other girl? I think he was using you, and the fact that he was trying to make a move on you, even though he has a new girlfriend PROVES that he's disgusting. If was going to cheat on his new girlfriend he probably cheated on you! Don't talk to him anymore. What a loser...

If he was using you, I wouldn't put it past him. He moved on really fast (were they messing around when you were still together?), he lied to you about moving, he cut off all contact w/ you, but he tries to hook up with you on the low? He is a jerk and he probably was using you. Be strong and ignore him and cut that loser out of your life - you don't need him!