diabetes and skin problems?

i'm sure people have already posted about this but i'm new and haven't poked around that much...but i was wondering whether anyone could give me some info on diabetes and skin problems? i'm 19 and have had type for 9 years now, and i've developed skin issues over the past few years that are ruining my self esteem. my a1c is very good, but i'm still developing stretch marks all over, i've got cellulite, and my skin is very dry. i feel disgusting and i'm desperate to make it better...what about diabetes makes these things happen, and what can i do to have normal skin again? thanks!