Ofelie, Did you ever read the book "The Gift of Fear"? It does say to trust your instincts. From what you are saying here, I agree with you. I also think he is a stalker, and he is mentally unbalanced.
I really want you to be safe. If you decide to go, make sure you are safe afterwards, and also for that matter the next week, month, however long it takes. There aren't that many threads that trigger me to this alertness. Yours did. I'm sorry.
((((((((hugs)))))))