insecurity

I've been with my bf for 3 years and now it's been 2 months that we got married. I've I always felt insecure/shy when it came to having sex because of my body. He usually always wants to go down there but I've always felt insecure of the way it looks down there . These whole years he's only gone down there 3 times cause I never let him . I get insecure because he's attractive and he could do better.