The way I figured out how to feel better about myself is to find something I truly love and am good at, and do that. I've always loved theatre, and I've worked so hard at it. It's the one place where I am a dependable person, even when I'm sick. It's the one place I make friends. A big part of my self esteem comes from this, I really like the part of me who will do anything to make the show go on. I've gone on stage even when I've been suicidal, and no one would have known except the people who saw me backstage.

Maybe you can do some exploring about what hobbies or work you like to do? Find something you love, get good at it. It feels really good.