@tinoria It seems you’ve posted twice basically about the same thing.. I suggest you keep one post going for continuity! It’s difficult for someone to flip back and forth between posts to get all the information.
This is a very sad story. It sounds like you’re both very nice people, but because of his mental problem (maybe depression or low self-esteem???), he can’t handle a proper relationship at this time. Yes, send his things to him and include a nice note.. suggest that counseling by a professional or maybe a pastor or older wiser adult might help him.