This wasn't even a "friends" or "buddies" thing. He thought he loved me, really really loved me. I figured out pretty quickly that he was a loser, and didn't want anything to do with him, but he wouldn't accept "Go away - I don't want to see you." He tracked me down even after I moved to another state (and, I didn't let him know I was moving, or where I was moving to). Pretty damn frightening. He finally disappeared - I figured he must have gotten into an accident and died, or found somebody else he thought he loved.
Likely he did the "I'll show her." thing and tossed his mind through the top of his skull.
(Actually, probably the best outcome. Would mean that he wouldn't stalk anyone else.)
Firearms accident? .38? Store bought or reload?
Or, maybe he is cooling his heels in prison somewhere for his "loving" ways. LOL. Either way, he is no longer stalking you.