How to stop this...I can't just do it...I don't want my teenage years to go waste...

Please guys i really want to stop it...no matter what. It's been 2-3 years i have been masturbating daily even if I try to stop it only goes for a day or two and i again come back to my cycle..no matter what I can't remove from such thoughts of gooning or masturbating...it's deteriorating my health...I am getting more skinny... please help me it's affecting my mental health too. I just want to eliminate lust from my life.