“Do I break away from these friendships?”

I have a friend, more specifically two friends who I am considering ending the friendship with. One has changed from being someone who is fun to hang out with, to just a jerk. He thinks I’m his punching bag, yeah we screw around, but recently it’s not been a joke. I’ve tried getting him to chill, but he won’t. It’s not like I’m even provoking him in any way.

The other friend has gone from a funny person to be around, to a self centered jerk. We could screw around and have fun, but now he’s got a girlfriend, and his girlfriend comes along, and then he becomes a jerk trying to impress her, and acts like he’s better than me in every possible way. The annoying part about him being a jerk around his girlfriend is I’ve told him how I felt about him treating me. So, that’s the situation. Do I break away? Do I make a last effort? If I break apart how do I do it?