I am not sure if this is the *first*, but I remember it being like a turning point for me. And tbh, although I have spent a lot of time analyzing my past for stuff related to depression and executive functioning issues, I never really looked that deep into this side so I'm kinda having a lot of realizations right now lol
It was 8th grade, and I had spent my whole middle school career crushing on my male BFF. He was funny, stood up to my bullies, artistic, and really handsome. But I was like...delusional or something. It seems like I was always confessing my "love" for him and he was always rejecting me, but it's like I'd forget and keep going. So anyway, we had come back from summer break and we were in gym class. I was really looking forward to seeing him! But when he came in, he went to hang out with these other girls that I hated. They were all skinny, pretty, outgoing, and "rich" (as I knew it back then, they were definitely well-to-do but probably not rich). Basically everything I wasn't. That year I felt so ignored, as my friend was suddenly interested in these girls and wasn't with me so much anymore. And this new girl came to our school that year. In my head she was my arch-nemesis, and she was also pretty and skinny and "all that." We had a formal dance planned for the winter, and for some reason I was hoping he'd ask me to go... ofc you know he didn't. He asked the new girl, and they "went together" for a while. I felt so, so, so rejected. He could have rejected me every single day before that, but all of that combined wouldn't hurt as much as seeing my crush with my most hated enemy. I never even really said goodbye to him when we graduated. He was hella popular with everyone, so everyone else got their goodbyes in. I just drifted away. Honestly it still hurts and I still think about him a lot. I wonder if he's the only guy I've ever "loved."
SO yeah, that summer was when I first experienced suicidal thoughts, actually. Because I wasn't skinny or beautiful and so I would always be rejected by the guys I liked. And I mean, that's what always happened. There was a similar guy I liked in high school. I felt like I would never be the girl to get picked, I was just some ugly fat demon that didn't deserve love. It's kind of sick, and I know that neither one is good or better, but I've wished plenty that this sadness made me not eat instead of making me eat literally everything. At least then I could be unloved and skinny.