Who was the one that got away?

I met this guy in February and things ended in April. I know it’s a short period of time that we talked, but I can’t help but feel this was my first shot at creating something meaningful. I was toxic at the time, and only now did I realize my actions towards him. Before moving away in a few weeks, I apologized to him, and he forgave me. But it still has me thinking how naive, anxious, and unrealistic I was with him. We had great chemistry, common values, and I was never bored with him. I wanted to see if anyone else could relate. Maybe it was too short of a time to judge but it sucks to think about how had my actions been different, that perhaps I would still be talking to him now.