What do I do in this situation?

There's a guy that I go to school with, and we were talking for about a month or two. I decided that I really like him. And he said he really likes me.

Before we had started school, his girlfriend of two years had broken up with him. He was moving on and that was when he and I started talking. But one weekend, his ex texted him and he realized he wasn't ready to move on, and he told me that he didn't think we should talk. He told me that he really likes me and that he sees a chance for us in the future, just not right now. He also said he wants there to be a chance for us. So I told myself, "Ok, I can wait and see what happens for a little while."

A couple weeks later, we started having conversation again. Then last Wednesday, I actually stayed the night with him like we used to do when we were talking, and it was the best night we'd had together. But then he vanished again.

Last night, I finally approached him. He said that he was talking to his ex again as of last week. I asked him if he had lied to me when he said he wanted to be with me, and he said that he had told me nothing but the truth. I asked if he even thought it was possible, and he said "Anything is possible." I asked if he could ever see himself liking me that much, and he said "I don't see why not."

So I don't know what to do. This guy made me happier and I felt more comfortable around him than any other guy. I don't know if I should wait or move on, because either one is going to hurt at this point.