I have tons of stretchmarks all over me. I used to be over 310lbs (of fat) and dropped down to 190lbs. To be honest, I was the only one who really cared about them. I would feel insecure or whatever and finally realized, after many girls telling me, that they honestly worry about way more shit than that. They can careless. They have them too, and they always think they need to improve something on their body. They never like or accept the way they look, no matter how good they look. You having them makes them feel a little more secure.
You are going to be the only one who gives a shit about your stretchmarks, trust me.