I don't want to hang with my best friend anymore
Why don't you want to hang out with your friend?
He is too boring. He always talks about the same thing. I need new friends.
If you are having issues with your friend, you should tell him about them. Maybe he doesn't realize he's being boring and repetative.
Why do I got to do that? I don't want to fix things.
You became friends for a reason and you should not want to hurt this person that you cared about. You should tell him how you feel so he has the opportunity to change.