Summer loving or Platonic Friendship?

Hello all, I have a dillema. I am 28 years old and have a huge crush on my 35 y/o coworker. It wasn't there the first time I spoke to him , but he had mentioned if I was his girlfriend he would be so nice to me. I waited a week to see if the feeling would fade, but it hasn't. I always been the shy girl. I missed out on so much in my life because I didn't speak up , so I told him I had a crush on him. I felt foolish, but he ured me it was allright and asked for my number. Sounds, like a sure thing right? WRONG! he never called me so I called him and so happened he was busy. Understand. But I don't understand how one day he is all about me and then the next "poof" he doesn;'t even know me. I read his horoscope and mine and found out he is more of the platonic type. But I can't be friends w/ someone I am ually attracted to. Please any advise. Is he playing hard to get or does he just want to be friends