"When you believe yourself to be ugly or worthless, it's hard to project anything beyond that. Often you don't even want to- after all, why attract attention to yourself when you've got so little to offer?"
A lot of the time girls look to others, usually a partner, for recognition and approval but they, in turn, forget to find it in themselves. How can someone love you when you don't love yourself? Forget the movies. Being in a relationship will not "save" you and you will not all of a sudden become the happy and "full of life" self you've so long desired for. Be your own salvation.
Think about that next time you're feeling small.