Being insecure is a turn off, rock what you got. Do you really think shooting lasers at your body is better than being yourself? I got acne in multiple places and stretch marks on my thighs and I don't mind it because it's the way I'm built. Who has the right to tell you what you need to be?
But really it's up to you, because I'm not gonna say who you need to be.
Also I'm fairly sure since you're 16 they'll go away over time.
I don't see it as a huge deal, there can always be worse things. A lot of people also have stretch marks, I have them on my arms and legs from weight lifting.
Oh gosh, I had the same thing |: I had like, 3 major growth spurts and got stretch marks everywhere, I showed a nurse and even she thought it was odd. But most of thm are gone now, and the ones that haven't are just faded. Just be confident in yourself and forget about them (: They'll go away eventually