How do I know if its abuse?

He doesn't hit me, but when we get into arguments he can get pretty mean. Yesterday we argued and he got angry and stood over top of me while I was sitting on the couch, so I couldn't get up. Also, he seems to be very controlling. I'm in college and I like to go have fun, I used to do this a lot but since being with him, I've stopped. The other night I went to a friends after work, he called me and asked when I was going to be home. I told him that I had had a drink, and if he could come pick me up when I was ready that would be great. If not I planned on staying over. He hung up on me and a few minutes later showed up at the party and told me that he was either taking me home right then, or I had to stop drinking. We also never do anything I want, unless I guilt him into it. However, when I turn him down on something he blows up and says that we always do what I want, but when he wants something he can't have it. He's also very touchy with sex. It seems like he has to have it every day, if not he gets frustrated. When I tell him no, simply because I just don't feel like having sex, he takes it personal, and thinks I don't want to have sex with him specifically. I tell him all the time it's not that I'm not attracted, its just that I don't want it as much as him. Most of our fights are from me saying no to sex. I've given in a few times, but found that I felt worse than if we had just fought. Lastly, whenever I get upset about something, and try to tell him about it, we end up fighting, and I end up being the one in the wrong and he's the one that's angry at me. DO you think this is emotional abuse, at least a form of it? I grew up watching domestic violence, so I know what it looks like to be physically abused, but I've never seen emotional abuse. At least not the sneaky, sly, smooth, manipulative kind. I just want to know what you guys think. Part of me thinks that if I even have to ask this, then it has to be wrong in some way, but I'd still like someone to either second me, or prove otherwise.