I'm going to break off a friendship over an ex
Are you serious? You would want to lose a friend over an ex?
I don't really know why I do that, but I just have a real bad feeling about the friend.
I hear you, but you should not break up a friendship over an ex-partner. If there is a problem you should figure it out and talk to your friend. Otherwise you seem petty and manipulative, and nobody will like being with you after they find out.
That brings real good point. I'll make sure to change who I am after that.
Don't do it after, do it beforehand. That best way to handle things.