If this guy is calling you names and making you feel worthless and suicidal then he is an emotional abuser. You have nothing to prove to someone who believes others over you. He doubts you even if you are away for a few minutes and you have to be with him or call him, sounds to me with all this and the abusive name calling like he is the one with the problem and not you, he sounds like he has a personality disorder like Narcissistic Personality Disorder or Bordeline Personality Disorder, please google and find out about them.