I had a friend where it turned out that she hated my guts,...

I had a friend where it turned out that she hated my guts, all through our friendship. I thought she was my best friend, and then, in high school, she turned on me and had sordid affairs with all of the people that I'd dated. It was less hurtful because I was in high school, so it was more like, 'What's wrong with you? Gross!