It's taken me many years to get the wisdom behind the idea of letting go Teal....& I sometimes still have the occasional sleepless night.
But the fact is...me stewing on something that's happened is only hurting *me*...I'm letting something that hurt me once hurt me again and again and again...
I can't change whatever it is that happened, I'm guessing the other person involved is probably sleeping soundly...so whats the point?
Try thinking about the things you should be grateful for, and the good things in your life.
If that doesn't work, I usually get up and watch TV or read a book - whatever...do anything but obsess on this further
D