I can't stop looking back

TW: Verbal abuse, Brief mention of 🍇

For some context, I (17M) dated a girl in my school (17F) and while we were dating, she was very abusive, treating like a child because I have autism, and she also 🍇ed me three days before Valentine's Day.

Ever since I've started trying to come to terms with it, I've been trying to figure out what went wrong, so I've been trying to look back on our messages, and I finally managed to download a copy last night. I've been going crazy looking back on them, because I don't understand why everything happened, and I can't find a turning point.

I need help.