I feel Depressed and don't want to do anything anymore?

Hi, I am 16 years old and have a lack of interest in doing anything anymore. I feel like there is no point of life and there is no point of going through all this b******* to die. I still go out with my friends, but I feel like i'm not friends with as many girls anymore and i haven't had a girlfriend in forever. I don't like the way I look and I Constantly think i'm fat when i am at a healthy weight for my height. I don't like to eat anymore or do anything pretty much besides go out occasionally with a few guy friends. Is there any way to fix this I have been feeling this for months now?