I'm thinking of returning the favor to an ex friend who abandoned me for being childish and never doing anything for them. She had a kid at 22 while living with her parents, was unemployed and was a drop-out
What made you so upset with this old friend?
When we were at school she was the admired one
I understand what you mean about having an admired friend. However, it is bad to seek revenge. It is a stressful way to live.
Maybe you are right, but revenge is a dish best served cold.
You should not be wanting to get revenge on another person. This just shows that you are holding onto a good bit of negative energy, and revenge is only going to make you feel better short term. You need to talk to your friend and let them know how you are really feeling.