Broken and alone

I've been with this guy for 2 years married for 1, he has cheated on me so many time its unreal. He promises me that itll stop and it was a mistake, says everything I wanted to hear to make me stay. But this morning and multiple times just this month, he has talked to other women on LinkedIn and now I wake up to him on a porn site trying to meet up with women. I took clomid to have his child, and he does this to me. I'm not pregnant thank god cause I'd hate to be this stressed and in agony and being pregnant putting stress on a unborn baby. I have never been in so much pain with any man I've dated in the past. He has ruined a good woman, I used to be full of smile and almost always happy. He has taken that from me, keeps me from my family, controls me. I just dont know what to do anymore. I've left and he begs me to come back