Plus size

I’m a plus size girl and have been with a few different boys and I’ve not had the confidence to have sex with my top off or to go on top as I I feel as if I’m gonna crush him or her comment on my stretch marks( I know I shouldn’t be with someone who doesn’t appreciate my body for the way it is” I’ve got the stretch marks from growing on my legs and on my stomach from my weight is there any certain position that would be helpful or any crams to help the marks fade I love sex and just want to fell confident to have sex with no top on and to have some lights on so I can make better eye contact( lights off just so they don’t see the marks as well) thanks!