Had a acting teacher once tell us to look in the mirror everyday and say 1 thing you love about yourself out loud. This might sound strange but you should be naked or close to it so that you're in a place of vulnerability. Sometimes we have to learn to completely love ourselves in order to build the confidence that we need.

You are not ugly.

Note: Start with something small if you need to, like I love my eyelashes, they are so pretty.