Large .... and they sag?

i have rather large s. 36 DD to be exact. i'm only 17 and like 130 lbs so my weight isn't a factor for my . my only problem is when i watch movies, the girls in them have perky s and all. mine are 100% real so they sag and kinda point towards the floor :( this makes me really self concious. should i be? or should i love them? i don't know. my boyfriend of two years says he loves them but i'm kinda grossed out by my grandma .