I'm engaged to a fucking prick

My fiancée and I have gone through a lot. He's the most stubborn person I've ever met. If I ask him not to do something he does it anyway because he thinks if he listens to me that I'm controlling. I don't control him at all. Yesterday me and him got into an argument and decided to tell his best friend (he works with him) that I called him all these names so him and his fiancée who was my only friend blocked me. This week I have 3 exams and I had told him I wanted to be stress and angry free so I warned him not to piss me off because I was under a huge amount of stress. Then he goes and does this which caused drama and me to lose friends. The only girl friend that I had. So I told him what would happen when they wanna go on a double date now. He said he would just go with them leaving me at home without our one year old. Can you believe this? Whenever we argue about something, it's always my fault no matter what and he never apologizes when he's wrong. He never admits that he's wrong either and drags on fights. He insults me every day. He calls me a cunt, told me I should lose 20 pounds, doesn't compliment me or give me affection or attention, and won't even have sex with me. He said I'm a disgusting human being that needs to get put into a mental hospital whenever I don't agree with him. He tries to do everything his friend and his fiancée does. He wants to be free and be able to do whatever he wants but I don't him he can't just do whatever he wants in a relationship, he needs to consider me as well. Nope. His stubbornness and ego won't let him ever admit that he's wrong and thinks that putting me down especially in front of his best friend makes him a man. I'm so angry and he keeps playing with my feelings. I'm pretty sure he's back to taking pills behind my back too. This morning i heard what was clearly a pill bottle open and when I asked him about it he told me I was hearing things. I didn't get a chance to scan around because I had to go to class. I love him and I'm so stupid for staying with this guy. I know I'm definitely not marrying him now. Please no negative comments, I just really needed to vent since now I don't have a friend to talk to.