Regret? That's a screwed up word.

I'd rather regret doing something than not doing something.

I would rather regret the things that I have done than the things that I have not

Feelings of regret represent our aversion to reality.

If I'm sincere today, what does it matter if I regret it tomorrow?

I don't do regrets. Regrets are pointless. It's too late for regrets. You've already done it, haven't you? You've lived your life. No point wishing you could change it.