What the heck is mi problem??? pleaz anwser=)!!! it will be mucho appreciated!!!!?

kk well i often get comments that i'm pretty from family and when i go to the stores guys always come up to me and say something like your hot, pretty,beautiful blah blah blah etc. and occasiomnally from freinds i get positive comments on my beauty and i used to think i was pretty but as i got older that has just tottally changed i still get compliments but i swear on my grave i dont feel beautiful whats wrong with me p.s im 13 if that heplz=(!!!