In the cafeteria at school 2018

I was really close with this girl, we were spending everyday together and she was a new friend. We really connected on a lot of different things and I felt like she was a soulmate sister to be honest. We were spending almost every night getting high and listening to music in the car and analyzing the lyrics, having deep talks about the universe and life, and I guess I read the entire thing wrong because she started to avoid me and saying she just had class or she didn’t have time in between class to hang out, which had never been the case. One day, feeling kind of sad because it was during a break when we always used to hang out, I went into the cafeteria and saw her with a group of friends from her high school, and I sat alone. She glanced over at me, and then the group looked over at me, and they all started laughing but it was like a quiet laugh like they were trying to hide it. I felt so betrayed and I never knew what I did wrong. Then I never spoke to her again.