I have a small history of behavioral analysis in my family, yet I have no clue what to think about this girl. Every time I try to talk to her to see if she likes me too, it's like my I.Q. drops from 157 to 60, instantly. I wouldn't want to tell her my feelings without knowing hers, I wouldn't want to ruin the relation we have as friends. So, I'm stuck here; clueless.

Have you asked your others friends to see if they know if she likes you or if they could find out somehow??

"I wouldn't want to ruin the relation we have as friends."

I think that's sort of your answer. Don't try to push something like being more than friends faster than it needs to go, if it happens it happens. Of course, if you're confident it won't ruin the friendship, then you can go ahead and tell her. =)