I have been friends with this girl Allie for about 2 years. She is 2 years younger than me and I’m in college and she’s in high school still. Despite this we were still pretty good friends for a long time. She also has a brother who is the same age as me. His name is Max. Max and I knew each other and were friends before Allie and I became friends. In that time I started hooking up with Max even before Allie and I become really good friends. Max and I have been hooking up for like 2 years now it has been a little on and off but for the most part it’s been pretty steady. I never said anything to Allie about it because when it started we were basically acquaintances, but I thought she knew because we were all at a party together and everyone knew that Max and I were hooking up during the party, including her. She claimed that she “found out” about it like 4 months afterwards and was so mad about it she was sobbing her eyes out, calling me a fake friend and how i did her so dirty. She even said she didn’t want to be friends with me if it ever happened again. Eventually we worked through it (I thought) and we went back to being close friends. In the last couple of months Max and I have become a lot closer and have been helping each other through some hard times. Allie has been more concerned with her high school friends and that’s fine with me bc I’m not a super needy friend. Well I went and hung out with her brother this weekend for a pretty long time and she found out and started slamming doors and stomping around and crying again. I just don’t understand how she is so negatively affected by Max and I’s relationship when it has never affected our relationship like I never ditch her to hang out with him or anything. She keeps saying that I have lied to her but I never did she just isn’t okay with me having any type of relationship with Max but I don’t get why she wouldn’t want us to be happy.