If a guy felt you up? (for girls only)?

Ok if she is letting you grind on her then I seriously doubt she is going to care if you do anything else. You are probably over thinking this. Just be yourself. One think about girls, well most girls, is they can read you like a book especially if you are acting outside your comfort zone. You seem to be a really nice guy, if a girl don't like it, she will let you know, just act cool about it.