I had one loose canon that I went on a date with and then constantly blew up my phone and left desperate messages but I shut that down real quick and later found out that he had a gf! Chances are he was looking to escape that relationship and probably found someone to replace her.
The only stalker I had or felt like a stalker was a (girl)friend and she was just possessive and a little nutty and thought I was her best friend and I shouldn't be hanging out with others because it drove her to jealousy! It wasn't a sexual thing, just plain woman possessive jealousy. I shut her down too and blocked her on my fb for about a year, then I took her off block and now she only sends me invites to those selling parties which I always decline and never talks to me. Just the other day though, she approached a friend of mine in their gym and introduced herself and told her she knew her because she had seen a picture of her at my gym during an Open Day, on FB??? I have warned my friend about her, she had already friended her on FB and commented on every single picture or status she had put up, lmao. We had a great laugh about who she will be stalking next!!