You may very well be either bi or lesbian, and just haven't admitted it. Or, you may be straight, who knows...but if you're attracted to women (or women kissing women), then you're at least a little bi.
I've never had "crushes" before. In fact, I mostly never even noticed the opposite sex. I had "mini-crushes" (for instance, the guy who played Kyle on Living Single...I just liked his voice, nothing else...and I've always wondered what it would be like to kiss Coolio, but never had any...