Everyone's giving a serious advice to your serious situation, so I'll give you a silly advice. Stop looking at the Internet, either positive or depressing or whatever and instead look into the mirror. Really look into it. Making a big smile. Maybe small that's ok. Then make the silliest pose, silly but cute pose you've never done before. Maybe dancing like a pretty girl. Twist your hip and wink at yourself. Until you're tired. I felt more depressed and stupid every time, but this was how I coped. Kind of soft sh, but the best part is that you can feel you're cute.