Shy / idk

Malissa
So I used to weigh 190 ... I'm 5 ft tall. 
Since 2011 I lost 70 pounds 
I have stretch marks on my stomach and 
No matter how much I try to work on my abs 
I have some loose skin on my stomach only 
I'm in a relationship with an amazing man
He himself used to be overweight and is now fit 
I'm always shy when we have sex 
I don't want him to see my stomach 
Even though the stretch marks are I guess like my skin tone color 
You can still see them 
I'm really shy and every time he tells me not to cover myself 
I always tell him to turn off the light 
Because I don't like my stomach 
Even though I've worked my ass off 
Just that is bothering me 
I have stretch marks on my side as well but those don't bother me just the ones on my stomach 
My bf tells me he loves me and I shouldn't be ashamed of myself he loves me no matter what 
But it makes me really uncomfortable :( idk what to do or thoughts