I like a boy with a girlfriend, and what do I do now?

I was hanging out with this guy with no romantic intentions in the beginning. He asked me to hang out with him alone and I knew he had a girlfriend, but he said he didn't have any romantic intention as well. We were getting a bit physical when we hung out. He tickled my waist, fell asleep on my hand, and TRIED to kiss me. But I kept on turning my head because if he wanted to do that to me, he needs to leave his girlfriend. He can't have two girls at the same time. When we got home, I phoned him. Then he started uttering words....he couldn't get it out his mouth, he was hesitating so much and almost whispering the words so I almost couldn't hear him speak. This is what he said, "You know....I have a girlfriend, right?" I told him I knew. He said, "So we can't be so intimate...we can still hang out and talk maybe not so often...my conscience..." He told me we can only be friends. I told him it was alright because we really were just friends. I didn't tell him how I felt but it all seemed obvious anyway. I wasn't talking much and I sounded...distant. He could tell I was sad. He started feeling really bad for hurting me. He said he wants to kill himself for it and he wished he didn't have to live to make such a choice. He told me he did actually fall for me, and he liked me. He started going nuts, almost. Whining and all. Saying he really hates himself. I asked him if he wants me to give up on him, and he said he doesn't know. He told me he can't DECIDE on it, which in this case I believe he can't decide between us two. After all, he fell for me in two days of hanging out and two days of speaking on the net, and he's gone out with his girlfriend for almost a month. He was going to stay up with me to talk about the issue for half an hour, since he has to wake up at six the next day and it was already 12. But he ended up staying up till 2:30 and he was really upset. I told him he owes me two packs of tissue paper. He said, 'Don't cry :( if you cry I'm going to cry, too.' Then he tells me how his girlfriend is away for holiday, and she rarely goes online. He says he IMs her and she barely replies, and when she does, she talks about how handsome the guys where she is at are. He complains about how he doesn't even know how she feels and even if he missed him or not. Why did he complain about that at that point? Does it mean...he's revealing the fact that he's got uncertainty for her even though she's his girlfriend? That seems to me like he's ysing the bad things about her, and leaning towards picking me? I may be wrong. I asked him again if he wants me to give up, he tells me he doesn't know and I shouldn't ask him now because he can't answer. I can't get over this guy. I've had a couple of boyfriends in the past and none of them made me feel this way. I swear, I feel like...I'm absolutely allured by him. I cried over this so much, and I'm still crying now even though it's the next day. I don't want to give up on him. He's taking me to the doctors on Thursday because I caught a cold. What do I do? Do I have a chance?