What is wrong with my boyfriend!very crazy situation! pls help!?

It sounds like you already know. He is trying to control you, and you standing up saying No about him coming over made him realize or think that maybe you wouldn't let him control you anymore. Controlling relationships like that only get worse. He's trying to make you jealous and make you realize you want him more, because he thinks he can do that, by talking to your friend. If shes a real friend she wont talk to him. He's just grasping at straws, you did a good thing by standing up and saying No. Keep doing it and just see where things go. It might make him calm down on the controlling, or he might get tired of trying and find some other girl who he thinks is weak that he can control. Wear what you want!!! No matter if your 100lbs or 300lbs wear what YOU like!