Aitah for smashing an expensive nice ring I bought in front of her after dating for a year and she threw it away for a different guy?

Context, I was a senior in high school, things had been shaky for a while so I finally called it off even though she knew I still loved her, anyways a week later she decided to go screw another guy, and told basically everyone, so I gave her all her stuff was hurt and devastated that I meant nothing to her, after giving her all her stuff I set it on the ground and smashed it in one stomp and drag, $250 ring btw, had about 16 lab grown diamonds one being a big heart shaped one, but she still gets mad tells people about it. I know she hasn't gotten over me and whatnot and she realized that most other guys won't give her everything and just want the sex, but looking back, am I the Asshole for that?