Why I had to take antidepressants

So this may seem like a very silly/childish story but I’m still sharing it. So I’m the type of girl who always thought relationships/marriages were a waste of time and living alone and independence was better option. This was actually based on what type of environment I grew up in and watching my parents’ relationship. (They had a forced arranged marriage, my mother was a teacher from back then to now and my father was unemployed back then and really greedy for money, they used to fight a lot and still do, growing up I had to face a lot of physical & abuse). I only had a crush on one guy my entire life back in the 6th grade and he was a jerk! He treated me really bad, said bad things about me just because I liked him and he didn’t like me back. Anyways, 5 years later I had another crush on this guy, he was a batch mate, a really nice guy, very charming and he reads books just like me, he’s very understanding and a really good friend, very positive. I fell really deeply for him for like 2 years. I even used to pray for him that’s how deeply I fell for him. He never treated me badly or anything infact he was always nice to me, to everyone. But his friends didn’t like me and didn’t like the fact that I liked him so they messed up with me a lot. They spread rumors about me, involve me in other people’s drama and did a lot of wrong things that even involved my family. And threatened me to never defend/speak up for myself cuz if I do, they’ll ruin my reputation to the guy I fell for. Back then I was very vulnerable and I kept quite cuz I didn’t want my family to know about that guy nor did I want that guy to believe anything bad about me. While all these dramas were happening, I got to see who my real friends were and who weren’t. I was in a friend group for all my life, basically for the past 7+ years I was best friends with them and it turned out they were the backstabbers! They knew what was happening and still didn’t help just cuz they were entertained of the dramas and didn’t want themselves included. I left them. All of them. It was a one night decision. Once day I had these best friends for the past 7+ years and the next day I was all alone. But I was happy. I was relieved. I was free. Free from all the dramas, all the bad influences. After that I realised how much they changed me to turn into them and how toxic our friendship actually was and how awfully jealous they were of my success. It’s been a year that I left them and unfollowed the guy I was insane for and stopped thinking about him. One thing i still wonder is that : the guy didn’t like me back and everyone knew I liked him thus all of his friends treated me soo badly just for liking him. He never stopped them or anything. He didn’t say anything, he just let them treat me like that. I get it he’s not interested but why would a guy let his friends mistreat a girl just cuz she liked him?