Hi.. this my first post.. I am going to sound so silly but I need a third person opinion on my situation. So, I am 24 years and have been in relationship with a guy for almost 4.5 years now. 

From our first meet, I got to know he's a very hard working guy who values his family so much even if they don't even respect him for his efforts (which is his personal life and I don't want to get into his stuff with his family). In the beginning 4 to5 months everything was going good. We moved together after 3 months of dating as we both are living in a foreign country and only have each other for support. 

After moving in, I noticed he is very suspicious of his phone and other social media platforms. Upon asking he said his family is very conservative and he's muslim and I'm hindu. I didn't argue at this point but then I caught his messages with another girl (in his home country). Upon confronting he became too aggressive and started shouting and even abused me for touching his phone. After a while he explained this was his ex who is constantly disturbing him and he doesn't want to be with her. He said he can't straight away tell her to go away as she is close to his family and would create a scene at his home. I tried to understand it practically and after a while I thought everything was over between them. I also forgave him for the abuse. After 6 months he went back to his country and contacted her again and when I got to know about it he said it was just to end things officially. And again I didn't say a word except for crying because I loved him so much. After that I thought everything was going good.

But after 3 years of relationship I again caught him cheating and this time it was his high school friend who is now his girlfriend overseas. He again manipulated me saying he's not interested in her. It's just that he needs citizenship under assylum approach that's why he's with her. I understand citizenship is important for him and his family as he is the sole bread earner for a family of 6. But I can digest this fact. He says he loves me and all but I don't know. When I ask him to leave my place, he blackmails me that he won't return my money ( borrowed at the beginning of relationship) and the amount was huge. He then portrays me as a evil person in front of our friends. 

I myself actually am not able to leave him because I'm an introvert and don't have many friends in this country and he's my only friend and supporter here. Now I am really confused as what to do and how to do.? Really need some advice.

Thanks.