What's inside a girl?

The Cramps, yeah.

What's inside a girl, I can't understand what a girl wants, let alone being able to give it to her.

I know how people feel and I like to help them deal with their feelings, so in that regard I understand women, but once we're talking about attraction, seduction, sexual interest, I'm clueless.

The one time I girl liked me I had a very difficult time accepting that she liked me for real, I would constantly try to (consciously) prove her wrong by sharing moments of weaknesses, failure and insecurities about my body with her.

I've watched dating advice videos, I've read books but I still don't know what women want. It's like math, when I think I'm getting it, I realize I don't

How can I figure out what's inside a girl?