I don't know how to deal with my depression due to my partner's continuous infidelity

A few months ago I found out that my "husband" was unfaithful to me having conversations with many girls and one of them was in a serious relationship, he even sent money to her and paid passports to her and her son. I am pregnant and alone in a country that is not mine, I decided to give him another chance but he has talked to that girl again. I can't with so much anymore...