Is this guy nuts? Or is it me?

really like him, and I really hate him. He's such a sweet A.s.s hole! One day he'll be the nicest and sweetest guy in the world, saying "Hi ____" In the nicest, most normal voice ever. Then the next day he won't even talk to me, and when I ask him or his friends something he snaps. Its so weird, most of the time he's great but not always.. Anyways he's dropped so many hints. Like today, I was standing near him, and he backed up to be closer to me. It felt amazing to feel his warm, soft skin near me and Ugh! Its so hard to explain, but anyways. He put his arm around me a couple of times and stuff and he doesn't do this to other girls either, he's not some player. Whatever. Then one day he had what looked like a hickey (it wasn't) so i pointed it out and was talking with my best friends and he was right there and we were laughing and his friends were laughing and he looked mad at me. then the next day I called him gay..stupid I know. But I am just one of those people who joke about everything and harmless stuff. But when i said that he acted all tuff and was like "No way I like girls" and I was like " Awww you you do like (the girl who he used to likes name)" and the said "Yah i do!". And gave me a look. It was weird.. So..what the hell is up with this guy? Does he like me? And every since the "gay" thing he's been good, well mad at me for a day or two. So? What do you think of this guy