A lot of teens experience what you're going through. It's not easy! I used to be the same way, and eventually I figured out what the problem was... I was way too self-focused. Constantly I would mope around just because I had a zit or I figured out my fingers were bent weird. I modeled for a while, and that made me feel bad about myself because I was constantly being judged-- too skinny, too fat, too pale, too tall, too short. I felt like I wasn't good enough for anyone. So, not too long ago I got myself to stop thinking about what I look like and if I look ok and stuff. I can't describe how happy I am now. I was in a restrictive relationship for a while, and now that I'm out of it contributes to my happiness as well. Do you have any idea of the cause of your sadness? Like what causes you to cry?