I broke up with my fiancé...

My SO & I have been together for 4 years, and it has been a roller coaster. We were together for like 3-4 months when he proposed, and we have lived together for the majority of the relationship. Being with him, I stopped spending time with friends and family and I tried to justify it with the fact that we were becoming a family of our own. In reality he has always been very jealous and untrusting, so spending time with other people often led to arguments at home.. After 4 years, of me being 100% honest, faithful, and loyal he still doesn’t trust me. He still accuses me of talking to guys behind his back and even hooking up with my female friends on a semi-regular basis.. We were literally JUST trying to conceive like 2 weeks ago, and he is still accusing, treating me like a cheater, and then he shuts down and won’t communicate or anything. I just can’t do it anymore.. I feel kind of relieved because I feel like our relationship has been unhealthy for a while, but he is trying to play the victim now that I’m finally standing my ground. I have threatened to leave before but I never keep my word. I always forgive him for being so messed up and put his needs before mine. Not anymore...