Stretch marks

I have terrible skin!!! I never have break outs and rarely any dry skin but over the past year or two I have very large stretch marks come up all over my body. 
1.I haven't gained a lot of weight or lost any. 
2. I've never had kids or been pregnant 
3. I'm 7 pounds over what I should be so its not like it's from weight gain because I haven't lost or gained any dramatically 
Soooo what's up? And how can I get rid of them.  HELP!! #superembarrasing