I dislike my girlfriend's best friend
What bothers you about your girlfriend's best friend?
They are always trying to steal my girlfriend and frame me to look like a bad person
That guy sounds like a real asshole!  It's understandable that you want to protect your relationship with your girlfriend by keeping her way from him.  It sounds like he's trying to steal her away from you!
It's not like that. I'm going to dump her because this is getting really complicated and I want to focus on gaming
I think it's okay to end the relationship as it sounds like there's a bit of underlying drama that you don't feel like dealing with. Sometimes issues aren't worth dealing with and moving on is the best for everyone involved. Good luck with your gaming!