Why are you getting so angry?
My situation is different because my boyfriend isn't jealous or insecure about my reasons for wanting to go out. If he wanted to go dancing, I'd be more than happy for him to go, but he doesn't want to. However, he doesn't see that as a reason to keep me caged either. The OP is insecure, so the nature of the situation changes. Like I said, I think he needs to loosen up, but he won't just be able to change his behavior over night. His girlfriend will have to help support him in changing, but based on her responses to his feelings about the situation, she isn't capable of that.
And I mean that the OP should figure out his standards. Everyone has them, and he has a right to a set of standards that he would expect from the people in his life, including his girlfriend. It's not so much her going out, but the casual way in which she dismisses his feelings about it all the time, that bothers him. This is why Vin is saying she is too immature. She can't sit still long enough to empathize with her boyfriend on this.