Stretch marks?

I have stretch marks all along my butt, under-butt, and on my hips and they are very visible. Some are dark in color like a purple-red and the rest are just white and really noticeable (I'm quite tan). Its makes me really self conscious and lowers my self esteem. I can't really wear swimsuits or bikinis without wearing shorts for the fear that people will judge me or think I'm ugly. My friends don't have as many or as visible stretch marks as I do. I'm 16 and when I was transitioning from 8th to 9th grade I had a huge growth spurt (4'11" to 5'7"). Ever since then I haven't really worn short shorts or bikinis or things like that. I'm also afraid that if I get into a deep relationship with a guy, he will see my stretch marks and leave me bc of them or he'll judge me or think I'm ugly bc of them. My previous bf said he didn't care about them, but it made me think that he did. Does anyone else have these kinds of stretch marks? Are there any solutions to make them seem less visible or make them disappear?