I am attracted to a guy that I don't want to like?

I have known this guy for about 10 months now. We met through mutual friends. I was not immediately attracted to him, and about a month after meeting him, he and one of my friends hooked-up. She implied that the hook-up was not consensual, but she also said that she didn't remember anything that happened that night. Everyone who was present that night claimed that she had been all over him the whole night, kissing him and grabbing his junk right in front of everyone. And then, when they all got home, one of our friends tried to put her on the couch and she refused, insisting on going to bed with him. She has a habit of getting drunk and sleeping with people and then denying it. It was a big deal for a few months after wards, with her being angry at everyone from that night because they didn't "take care of her". Since then, things have blown over, but she still maintains that he d her, she just doesn't remember it. My issue is that, over the last few months, I have gotten to know him as a friend (he lives with my roommate's boyfriend, so we could not avoid him, like my friend would have liked.) and I like him. He is super nice, exceedingly generous, and not just to his friends or pretty girls, to everyone, even perfect strangers. He is nicer than anyone I have ever met, and on top of it he is extremely smart and funny, and I really respect him and enjoy talking to him. Now I don't entirely trust anyone, but I have slept over at their house before after having drank too much to drive home and he has never so much as made an attempt to touch me. And I have even slept in his bed, and he was considerate enough to put a wall of pillows between us. The more I am around him, the more I find myself liking him, and thinking about him when he is not around. We went dancing one night with some other friends, and while we were dancing, he told me that he liked me and that he was always asking my roommate when I would be coming over. I don't know what to do here, I know I shouldn't like him and definitely shouldn't get involved with him, considering what happened with my friend. Even if her accusations, were false, and I don't know that they are, I know I would lose her as friend if I got involved with him. What is the right thing to do here?