My boyfriend doesn't mind them, but I know they really bother my best guy friend. Here's the thing, if you're already dating him, and it gets to the point where he sees your body, and he dumps you because you have stretch marks, you need to reevaluate your choice in men. It should never be a deal breaker. If they bother you, lotions rich in Vitamin E helps make them fade.
don't make them into a bigger deal than they are, almost everyone especially girls have or have had them at one time
Embrace them, because they are completely normal. Most girls have/had them, especially in the boob area. I use to have them around my breast area during the development stage..they'll eventually either get tan, or go away so you don't see them anymore.