So this was a while back, when I was working as a Project Coordinator (I've been promoted now), a new PC joined our team and it was my job to train her. I was attracted to her and we talked and laughed as I was training her. Eventually, I made the decision to ask her out on a date and she squarely rejected me. I admit I was very upset and embarassed, I lost face.
I ended up giving her a negative review on her evaluation and she was let go abruptly. I tried to tell her that it was due to strictly professional reasons and subsequently blocked me on Facebook.
Some people are spreading rumours about me that I did it because she didn't go out with me and laughing about it.
What should I do?