Getting dumped or trying to get in her pants?
If first I'd be depressed for a few months before finding a reason to put all the blame on her or someone else instead of me, then move on.
If second, I wouldn't get fucking anywhere. I'd try to make friends with her, but get absolutely nowhere even if I do become one of her friends and get upset at the lack of results. Probably would fuck up somewhere later down the line and would end up performing what I would do if I got dumped.
Middle school me was kind of a bitch.