Sometimes it hurts.

Recently, I made the decision to break things off with someone I was walking a dangerous line with.
It was a mutual decision, because he couldn't give what I needed, and I wasn't willing to let myself grow gradually more and more resentful of not getting my needs met.
I wasn't willing to harm his current relationship, and he wasn't willing to harm mine.
So we walked away.

It was the right thing to do.
The grown-up thing to do.
The ethical thing to do.

And that doesn't make it hurt a damned bit less, any time I let myself think too hard about it.