Hurting

So I found out the guy I was sleeping with and talking to doesn't want to hang out anymore because he is talking to someone. What pisses me off is that he didn't want to hang because we end up sleeping together which I understand if you are talking to someone else but darn. We finally agreed we could be friends and that it wouldn't be weird between us. I am about to be mean though. He will be sorry he messed with me.