I'm confused at your love statement.. you tell us that this person isn't the one for you, but you still love him? Anyways you're not his wife and hes not your husband. You're not responsible for taking care of him. Hes a full grown man, and he should be taking care of himself.. I think it's rather immature of him to use the suicide threat to keep you mentally locked up. Hes clearly blackmailing you with this threat, and that is NOT love at all. I would muster up the courage to tell him to leave your house, and finalized the breakup. If he starts using the suicide as a threat... call 911 and report the suicide threat to law enforcement. They will take him to the hospital to get treatment.