Basically the title, I want to learn the arts of understanding the opposite gender and interacting with it... Also, where to find girls? Since my friends circle is pretty much small...

Some details about me: highschool student, loves computers and programming, 17 years old male, pretty anxious, shy, with some depression salt...

I failed recently to pick up a girl's signals (female classmate, 17 years old, she was touchy with me, touching my leg, touching me on the back, touching my butt lightly, not wanting a relationship, not picking up her interests correctly...) , so I don't want to be an asshole again...

My plan is to prove her that I changed in these 3 months of summer, then try to befriend her... She said that she doesn't want a relationship now, which suggests that I may have another chance in the future...

Anyway, my life doesn't count on her, but I don't want to let her think that I am an asshole (which for sure I am)...