STALKER ALERT!!!

I don't know how many of you know this, but I have what I like to call a stalker. While my stalker, we will call him Kyle, doesn't do all of the normal stalker stuff like following me around and peeping into my window. (At least I hope not) He does text me about every two weeks begging me to go out with him or do other things that men and women sometimes do. I have been turning this boy down for over a year. When is he going to get it?! It is so frustrating. If I don't text him back he will just keep texting me every five minutes until I get so pissed off I do text back and bitch him out. I think he must like that because after I get done with that he tells me he wants me. Then when I do just text him right away I get a when are we going to hang. I say never, and he says but I miss you baby. So here is my general question: Why are some men so desperate that they have to keep bugging the same girl over and over again. When will he just finally give in and realize that I am not interested in any way shape or form????