How to deal with regret

[Primrose121]

I have posted on health about my ears being damaged after going to a gig with a friend. The health side I am dealing with. I am struggling with the regret of replying to the friend to say I would go. Life has been difficult since and the friend can never know. Any tips on how to get passed this

Accept that shit happens sometimes? It wasn't their fault, it wasn't your fault. It was life and life sucks sometimes.