It is impossible to know with certainty what might be wrong. What is clear is that he is mentally unstable. Psychologically, it will be difficult for him to engage in a healthy relationship at this time.
You are not a mental health professional nor should you try to treat his problems. His problems should be handled by mental health professionals. When and if he threatens suicide, your response should be to call the authorities.
The purpose of dating is to determine if the other person is a good match. When a bad match is evident, it’s time to move on.
You stated that you “wish I could stop talking to him.” You can, if you choose to. The longer you remain in the relationship, the more difficult it will be to end it. It would be in your best interest to end this relationship as soon as possible. Please take care.
Dr. Kristina Randle