Why am I ugly when I tell you no

I am bisexual and this has happened with both men and women. This guy had a huge crush on me and continued to ask me out and I kept rejecting him. I started dating someone else and the gut who had a crush on me started telling people I was ugly and my breathe stinks and I'm disgusting. If I'm all those things why did he keep trying to get with me? Next there was a girl I dated a little while. I found out she was in a relationship while we were dating and I ended it. She apologized to me for lying and said she still wanted to be with me, but I don't do that cheating shit so I told her no and she called me an ugly dog. Like she was just between my legs a few days ago. Was I ugly then? Why am I ugly when I reject people?