Dont worrie.. im 17 i have very thin skin around my eyes.. i do get enough sleep im sure of it, from sleeping in some times.. ahem 4 times. I do have blue veins near my eyes so thats why i got dark circles around my eyes.... A basic cover up helps... Dont try eating more to get fat there cause it doesnt work.. im 200lbs and still have them.. and chubby cheeks added to it... its perfectly normal.. be glad i have a friend who has red circles around her eyes.... she looks stoned all the time.. even though she does not do drugs...

if u drink alot of pop try cutting down.. or quit drinking caffene.. caffeene dialates ur blood vessles making the circles look darker.. i once had 7 pops on day my co workers at the nursing home thought i got punched...

hope this helps