Why is my friend/FWB treating me as a booty call/sex buddy more than a friend?

I have a friend/FWB who I've known for a few months now. We sometimes talk. And when we would hang out, we would have sex.

However, now, our relationship is on the rocks... He recently broke up with his ex girlfriend, which I believe is because of me. Because a few days ago, I yelled at him for being in a relationship despite the fact he wanted to stay single. Hence, he and other girls couldn't go out with him. He seemed contradicting, a fake, liar, immature jerk! He told me that I made him feel so bad.

Yesterday he text and called me but I ignored them until late last night. We didn't talk much though. But, afterward, I text him saying, he is being unfair, obnoxious, thick faced, etc. Whenever I would express my feelings, thoughts, etc, he wouldn't apologize nor make an effort to change his ways.

I have done nothing but been a good friend to him. Whenever he had problems, he would call me and discuss them. I don't deserve a man like him in my life!

I am trying to ignore him from now on. What can I do to improve our relationship? Why is he treating me this way? Why is he acting all degrading? What am I doing wrong?

**BEST ANSWER GETS 10 POINTS!**