At a house party. The girl I made out with was someone I had a huge crush on, but who was 'on a break' with my best friend at the time. She turned out to be a really horrible person the more I got to know her. Eventually, it got to the point where she'd be flirting (heavily) with me one minute, and then calling me a stalker and telling me to go kill myself the next. She and her friends also started to bully me rather badly in school and when I reported everything that happened to my teacher, they simply got off with a rather informal warning. After a couple of years, she actually added me again on Facebook. I still accepted her friend request because maybe she was willing to apologise to me, but that doesn't seem to be the case. I think we spoke once or twice since. Half of me actually wanted to confront her about it there and then.