Ik this is gross but like idk what to do at this point

So I’ve been feeling like total crap and my body looks terrible. I cried for hours bc I look like this. I can’t even look in the mirror i am that disgusted with myself. The fat is one thing but the stretch marks kill me. IM ONLY 16 and it looks like I had triplets or something. I’m so done with how I look and I’m at my wits end. I’ve tried dieting and I can’t do it I love pasta too much. And I am never consistent with exercise. I either forget or don’t feel like it. I’m so upset. Please help