wrong in so many ways

I am having sex with a married man. This is not some I would date but he please me sexually. He thinks he is the only person that I see and have sex with, when in all actuallity I am having sex with several other men. I don't feel guilty of it at all, is that bad? I also pick up random guys of a sex site and have sex with them, I know this is dangerous but I can't stop. I think I am addicted to sex. I also do not have feelings for any of the men I have sex with. I have not felt anything since my ex broke my heart....