Relationship advice

Me and my boyfriend have a long distance relationship. We been together almost an year. In the beginning we were good..we talked a lot and all that..but then he moved to another country to be able to become a doctor..to go to college. His family doesn’t know about me or us. He is a Muslim. In the beginning when he landed to the new country..we talked on call for a short period of time..texted occasionally. Now he doesn’t call and we text but once or twice when he has internet. He goes on this other app every time which at first he told me that he was talking to his family but now I’m just doubting him. I’ve been trying to leave him but he convinced me not to..to wait for sometime...to clear things as soon as he go to this other country which will be tomorrow if possible. I’ve been crying/hurting to the point I don’t even want to wait. He is big on family..he is a family man. He has told me that he can’t call or text me as fast because he is around people all the time plus he can’t being talking to girls unless it’s family. What should I do ?