Lillian, I have an ex besite. Fast forward to 4 years later and I actually do not hate her anymore. I actually bumped into her unexpectedly yeasterday and put on my high road boots and gifted her with some holiday jewelry I was handing out to another friend in her presence. I had not expected to see both there together. I felt better for being nice and she gave me a big hug and was actually emotional.
Time is too short for us to waste our energies on those unkind souls. Of course, your situation is far different being that it is a work place and she is there. Ugh. It sounds awful. You have my sympathies. Right after my big blow up, I had to throw a party with this ex friend for the soccer team. It was tense, to say the least. Our spouses have continued a coaching relationship and we are forced together regularly. Bleh. That work situation sounds very stressful!