I am sorry you are hurting but you have to let him go. If he doesn’t want relationships right now then you can’t and shouldn’t pressure him. If you only dated 6 months long distance (have you met him in person?) I’d say it’s not the kind of situation where you need to keep contacting his family or expect communication from him. I recommend moving on. Are you seeing a therapist? I think it would be helpful for you to help you process this