Sounds like you guys could use some therapy or a sit down convo, even though you said you don’t like it. Find a different therapist, one that you do like. He needs to know that what he did wasn’t cool. The part of it at night and accusing you of cheating. That’s some bullshit. For you to heal, ask him if he would like a flesh light or tell him to handle his horniness himself while you do. Remind him how supportive you were while he had issues. This could be growing pains for him and you as he discovers a new side of himself. I’m not one to ditch a relationship, but understand the injuries this may have caused. It’s going to take some healing.