I have this co-worker who I sent a save the date to, mostly out of obligation and I now totally regret it. There were three of us in my department (my boss, co-worker, and myself). Since the save the dates have been sent, our work relationship has sort of crumbled. Our boss left, and we were split into two different departments. We sort of butt heads and it just isn't good. I am kicking myself for inviting her! It makes me sick to think that she will be there and I don't want her there. I only have myself to blame, but good lord does it make me heated haha 
. I can only hope that she doesn't come!
That's all, just needed to vent that out!