Does Everything Happen For A Reason?

Back years ago, around 6 to be exact, I passed on an opportunity to be with someone. Now I am regretting it. Actually, I have for 6 years. It probably wouldn't have worked out with that person and I would never be where I am today if I had decided to be with them (instead I told them to call another girl-who ruined his life). People always say "no regrets" but I feel bad about this one.

He eventually had a child with the life ruining girl. His son is now the joy of his life. Still, I wish I hadn't said no. I really wish I didn't.

Hanging on to this is no good but even writing this now won't make it go away.