How To Be Happy With Your Own Looks?

Savannah
Hey everyone,
Just needing to vent a little...
I used to always think I was beautiful, and I still think as far as my body I look good,
For someone that has 3 children,
But for some reason lately all my boyfriends exes keep adding me on Facebook,
And they look like freaking models!
Nothing like me at all... It makes me feel bad about myself... 
I don't have long hair,
I don't have a bunch of makeup, or nice clothes, I buy my clothes from thrift stores and yard sales,
So my kids can have the nicer things,
And now I feel ugly. 
Not good enough
And sad. 
I wish I looked like them.