Simply put, when you find someone to be with, both parties involved will make small changes to accomodate to the other but you should NEVER have to change your entire life around for someone. Someone that loves you will not cut you off from your friends and family. On the contrary, they will bring you closer to them. I know it will hurt to leave him but, sometimes you have to do what's best for you and staying in a relationship where you hurt and are alone all the time is not in any way, shape or form healthy for you. I would say to sit down with him and talk to him about how you feel but, people like him don't change. They will force YOU to change but when it comes to making changes for you, they won't. I am going to tell you to at least TRY but, if you see that things aren't changing now, more than likely, they won't. I just hope you can muster up the courage to walk out of that situation when the time comes. You may not have him, but you have your family. Even though you've been kept away from them, family will ALWAYS be there for you.