i think i obsess about some people ( maybe not an obsession but i am sure it is more than admiration)?

[corncrake]

Curiosity, there's nothing wrong with it and it's natural. There's something about them that captures your interest and with the help of facebook etc you can find out everything without them even knowing. I think the word you are looking for is "crush" which is pretty harmless and fun way of feeling all the stuff you would if you were in a relationship only it's a practice run. You don't fancy them as such it's just they have something about them that either makes you want to be/like/with them for a little while. Enjoy it while it lasts the inital rush is the best bit.