It sounds like he’s a sex addict. Why would you want to be with him, after how he has repeatedly treated you? There’s nothing more for you to do. You told him he’s free to have sex with anyone other than you and that he needs help. You did the right thing. It’s over and done. If he comes back begging and promising to change, you’d be doing yourself a favor to stay strong and don’’t try with him again, even if he goes to therapy. IDK, maybe by some miracle, and after a year of intensive therapy, he could change??? It’s more likely this is who he is and who wants a guy who won’t stay monogamous to commit to?