You've gotten some amazing advice here, and I'm not going to re-iterate it all - just one piece.

This kind of behavior can indicate more serious issues. Safety should be your first priority - change your number, bounce the emails if possible (some companies can let you do that), change your routine. Protect yourself. Not to concern you - but it really can be serious. Trust yourself - Crankin is right - if you get a bad feeling/funny feeling/you run into him "accidentally" - call the cops.