Most Helpful Girl
I posted answer, and just checked your updates, I think he's acting not propriate here. If I were his girlfriend, and he compliments other girl, tells her talking to her is the best part, misses her, I would be pissed. those are flirts and I think he's being more than just a friend there.
If he breaks up with his girlfriend, why not? but he doesn't seem like a genuine guy.. imagine he break up with her you guys go out and he does that to another new girl? unless he thinks he's total in love with you, you are the only one he can be with, which I don't think he does because if he did, he wouldve left his girlfriend already to be with you. I wouldn't trust this guy.
sounds like he's playing with you and sneaky behind his girlfriend's back.
imagine if the girlfriend knows all things he's been telling you?
imagine you are the girlfriend? I know it's hard to move on when you really like someone and he still talks to you daily, but he's still with his girlfriend.. just try to find better guy. worst case, he's playing both you and the girlfriend. I'm really saying this for you. you deserve better guy.