<human>: Could you distill the essence of the text into 1-3 sentences?

Throwaway, obviously.

Me (20M) and her(19F) have been dating for about 3 years now. We were, and are, so close and involved in each others lives that we basically lost all our other friends. It also got to the point where if either of us wanted to do anything we basically had to ask the other for permission. 

Recently we had a discussion and came to the conclusion that it would be best if we gave each other more space so we can have friends, go places, etc, without having to ask. Figured it would help build up trust between us and wed both be much happier.

Anyways, yesterday i went to a friend of mines house, ill call him Bob, and his girlfriend, ill call her Angie, was there. We just hung out, played video games, talked about computers, played WOW, and other misc nerdy stuff since all three of us are computer science majors.

I told my girlfriend what i was doing before. during, and after and she completely lost her shit at me. She started calling me a liar and a cheater and accused me of having an orgy with them (iv never cheated on her or lied to her, fyi) and basically started saying that she didn't want to be with "someone like me" and was threatening to break up with me.

I went home and she calmed down a bit, but was still upset. I tried to talk to her about how i thought we was being unreasonable and unfair, but to no avail.

I should also say that our relationship in general is really great, but their is a history of similar stuff happening like this. The worst part is there have been multiple times where shes done stuff that shes been mad at me for doing, but she herself saw nothing wrong with it at all. (Admittedly none of the things are "bad" by any means. Just hanging out with friends, etc. basically just anything that involves doing something without each other.) 

So, anyways, what should I do? Am i really doing something wrong that i just cant see, or is it her? any advice is greatly appreciated!
<bot>: We decide to give each other some space, GF freaks out, accuses me, and almost dumps me after i hang out with a friend. Dont know what to do.