confidence confidence confidence

Everyone keeps telling me i need confidence for someone to like me
And that the first thing guys look for in girls is confidence 

Well what if i did have confidence,but one day i looked in the mirror and hated what i saw?would i have any confidence then?

My mother keeps telling me if i want friends that i need to be my own best friend.
 But how could i if hate myself so much?could you do that?be your own best friend even though you hated every part of you personality?