So I am a girl and there is a girl that is two years younger than me, and we both like the same guy. What confuses me is, all year she has been trying to get me to ask this guy out. At the end of the year, there was a big dance and he asked me to go with him so I did. When I told her she seemed happy, but as time went on, she got mad at me and now, I basically can't talk to her without her making some comment on how mad she is at me. Just a guess, but I'm thinking she's bipolar?