i know it may sound insensitive, but his emotions and life are not your responsibility. from the level of frustration i read in your post, it does not sound like this relationship is going to pan out in the long run. right now you are being held as an emotional hostage due to his suicide threats. it does not sound like you are happy with this relationship or that you are getting back at the level you are giving. do what you must and if he threatens suicide then call the cops to do a welfare check on him. it is not you job to be responsible for his actions and emotions. maybe you could offer him the names of a few good therapists so he can work through his issues. i hope everything works out for the best. take care