why does my friend likes to post negative comments about me on fb whenever i make her mad?

[Nic]

I'm in a similar position. This girl and I had been friends since highschool days. Now in our 20s she is rude, selfish and always makes snarky facebook comments about me. Originally it was because I wouldn't ditch work to drink with her. One day after she did something truly horrible to me I snapped and told her to get out of my life. She made a status about how I'm such an awful human being so I posted the print screens of the awful thing she had done to me and asked people to decide for themselves who was in the wrong. The pictures were removed within 5 minutes. Not saying what I did was mature but if you have a friend like this just block and delete. You don't need them in your life.