It sounds like you are in an emotionally abusive and uncaring relationship. He seems lonely, frustrated, dependent, possessive... he is problematic and victimizing you. Unless he is willing to undergo long-term therapy and truly change for you (and it does not seem like he is), it would probably be detrimental to both your and his mental health for you two to stay in a relationship.

It won't let me post links, but if you Google "abusive relationships", the first website has some informative pages. Look at the characteristics of an abusive relationship and see if they fit your case. And remember that if you can't do it alone, find people you trust to help you along the way.

Good luck.