Regret

I don't like regret. There are many reasons to it.
Regret isn't even particularly useful, why feel remorse after something? It is already to late, nothing can be changed anyways!

"You are going to regret that!"
No, I'm not.

I don't feel regret. There isn't anything I feel regret for today. The reader might ask if I have never done anything unreasonable, something that would have been better to not do.
That's a very easy yes. Like I definitely did (and still do!) things that would have better been avoided, but were they really an avoidable failure? Also this question is easily answered: no it is not. Because if it was, why did I do it in the first place then?
You can also maybe to look at an example of yourself. When is the last time you felt regret? Was it avoidable? Why was it? Where you really emotionally able to make the decision you know define as being right? Have you considered every external and internal variable in that situation? Well, if you did you should know: there is a good reason you did that, and thats why it wasn't avoidable.

I see such happenings as a simple error, and as with with any error, one learns from it, learn what needs to improoved so that the error will not happen again.
Also, I've had times before where I thought I would regret it, but I didn't afterwards. Actually, quite the opposite, I was happy I did that anyways. Regret can't be trusted.