Stretch Marks

I absolutely hate my stretch marks. I am 17 and I have them on my hips breasts and inner thighs. The ones of my thighs bother me the most (I didn't earn them through pregnancy or develop them during puberty, I got them because I got fat, plain and simple...this is about her issue but I'm 5'6" and almost 160 pounds, the heaviest I've ever been...I'm trying to focus, per instruction of my nutritionist, on not losing weight but these stretch marks, they are just one more reminder of my failure). They absolutely disgust me. This might be particularly because I have an anxiety disorder OCD and BDD. I really want to get rid of them. I'm trying bio oil currently...any thoughts? Additionally, I have extremely sensitive skin. Are those little red bumps just my regular heat rash or a reaction to the bio oil? (Ignore my gross pajama bottoms)