Why?!?

What is it about some people that they just won't take no for an answer? 

I met this guy and after talking on the phone a bit, I decided I'm not interested in keeping in touch with him, even as friends.  He wants a relationship, I don't. He asked me about keeping some time open so we could do something together.  I told him I wasn't willing to do that; I have my own needs/wants/desires to focus on and that I'm not willing to change anything in my life in order to accommodate him.  It would hurt my feelings if someone said that to me.  Not this guy.  Ever since I told him that, he's texting me every day multiple times during the day (even though I asked him not to bother me at work) and multiple times after he gets off of work.  It doesn't matter that I ignore his texts for days at a time, he just keeps at it.  He's not going to grow on me, if anything, he'll be blocked from calling/texting me.  I'm not going to think he's so sweet that I'll rethink what I told him and change my mind, if anything, I'll think he's an even bigger stalker than I originally thought.  I shouldn't have to give him a reason for not being interested in him....the fact that I told him I'm not interested in having a relationship with him should be enough.  Guess that's another difference in our levels of maturity....this guy is almost 10 years younger than I am.

He's not as confident as I like a man to be...he needs a lot of reassurance and often fishes for compliments.  I think he's boring.  I would rather sit and watch dust accumulate on my furniture than go out with this guy.  He's very inexperienced and I just don't have the patience to work with him.  I'm not interested in carrying EVERY conversation we have...when I do actually talk to him, he just sits there saying nothing or is over the top with compliments.  I'm not 10....complimenting me on every little thing I do does nothing for my ego.  He offers to change into what he thinks will be more attractive to me.  I don't want a mini-me or a puppet.  Be who you are!  Most importantly, I'm not looking for a doormat.  If you find yourself offering to cut someone's grass just to be around, you're being a doormat.  If you're offering money or other materialistic items to get someone's attention, you're being a doormat.  You should think better of yourself than that.  Anyway, why can't you just take the no instead of pushing me to tell you you're boring, inexperienced, fake with all the compliments and things you like?