Needing some support for getting out of my first long term relationship

This person and I were high school sweethearts, and were together for about three years. He was the only consistent person my age in my life throughout high school. In other words, I didn't have any friends while in high school. On the other hand, he had several friends and got invited out frequently.

He almost never wanted to do anything with me, unless it seemed like we were going to have sex. I remember I wanted to go to this football game our senior year and tried to make sure he really understood I wanted to go and to please remind me. I would have done it myself, but I was usually not on our high school campus because I was joint enrolled in college full time so I never heard the announcements for the school games. Much to my disappointment, I saw on social media where he was at this game with all his friends. He'd do things like this all the time: go out without me, while making me feel like a forgotten item.

He thought it'd be a great idea to break up with me over text while I'm isolated alone and friendless during the pandemic, without having the decency to even at least call me. Not to mention he still goes out all the time. Regardless, we continued to communicate, till he told me he's voting for Donald Trump. I tried to let it go, but it boiled within me and I cut him off on all socials today. It feels like the closure I needed, but I'm afraid I'm going to regret my choices later... I'm afraid of being alone