I agree with everyone else. He's being controlling and trying to guilt trip you. He's obviously pretty jealous. When my bf and I first got together I told him I have mostly male friends and he can read my texts or whatever he wants. I even introduced him to one friend that has bipolar like me. My bf understands that I need support from my BP friend because he gets me. My bf doesn't have a MI so he knows I can't really talk to him and get understanding so in a way he's glad I have friends I can turn to.

So your dilemma is that you need to find a way to break up with him. I know it's hard but just sit him down and if you have to, hand him a letter. I've had to do that before. It's not the best route but with my anxiety, it helps. Good luck and keep us posted!