Last night me and my gf we're having sex and I noticed a while ago that she covers her eyes with her hands every time we have sex. This time I let my curiosity get the best of me and it backfired. She started crying and told me not worry about it. I stopped and asked her what was wrong. She said that she's really insecure and doesn't want to see my reaction to her "ugly" body. She's the most fit and beautiful girl I've ever seen and just standing next to her makes me feel ugly. I tried to tell her this but she just didn't get how pretty she was. I feel like shit for making her cry and I need advice on how to make it up to her and prove how pretty she is. Please help!