How can I deal with the fact that I'm not going to be beautiful?

I was a homely fat poorly dressed 12 year old who was made fun of everyday. I had to get homeschooled it was so bad. I'd heard that ugly girls grow up to be beautiful and clung to that. Now I'm almost 25 and still wish it'd happen. I'm not homely anymore I just feel plain and ratty looking. I'm not rich so I can't afford the beauty services I need and the clothes that fit my oddly shaped body. How can I give up the dream and realize I'm just supposed to look plain and ratty?