I’m awake and up super early again today

I’m having trouble sleeping as for some reason I’m thinking a lot about the person I used to be. In all honesty I live with a lot of regret about how I used to treat people. I bullied or was horrible to lots of people and at the time I couldn’t care less. I’d probably still be doing it now if one of them hadn’t stood up to me. I now have to see at least one person (usually more) who knows exactly what I did. I try to put on a brave face, but mostly I try to avoid them. I think this attitude and body language gives off something which now makes me a bit of a target, I seem to get picked on or belittled wherever I go - I’ve spoken recently about karma. Maybe I was always just weak and scared and trying to protect myself.
I’d love for some other bully to read this and change.