I'm going to end my friendship with my best friend
Why do you want to stop seeing your best friend?
I'm tired of his short fuse over everything.
People change.  Unfortunately, some friendships change too much and need to be ended and that is okay.
It's all his fault and he should have been more patient.
It sucks that you have to lose your best friend, but it is for the best. You are doing the right thing and will feel better about it later.