The comments about girls being bi just to follow trends, or to be "cool" may very well be true, but not in my case.

I've known I was bi since I first started having an attraction to any one. I've always liked girls more than guys and didn't think I liked guys at all for a while. I don't know how to explain it very well though.. I didn't just all of a sudden decide "Hey, I want to be cool, so I'm going to say I'm bi."