(boy-friend) problem! help me!!?

Okay it seems that he does like you, but since he has a girlfriend you shouldn't do anything. Since you are getting close you have to decide whether it's just a friend friendship, or its a more than a friend friendship that he likes you as. If he doesn't like you more than a friend just be a friend for him. If he does like you more than a friend, all you should do right now is just respond to his flirting like you were being flirted to. That girlfriend of his can't blame you because he's calling you, you're not calling him. Once his girlfriend finds out that he's beginning to cheat on her, and then they break up. That's when you can give it to him, but give it to him a week after the break up. That way it's not an immediate takeover. If you want to keep him as a friend it's best to wait for them to sort out this problem. Just be his friend right now and you won't lose him. If they break up that's when you can start showing more interest in him.