Still feel like the fat girl

You are 5'7" and borderline underweight for your height. I think you should reconsider your goals (even though you want to maintain your weight). I doubt your are fat, and you may want to speak with a therapist about how you view your body. I'm sure you are beautiful, but it's hard for us to see our new bodies when we keep thinking about our old bodies.

If (as objectively as you can) you think you need some improvements, maybe think about trying to change your body composition either by gaining weight and putting on muscle or eating at maintenance and adding in some progressive resistance training.

This is a good read about the difference of being skinny and being "toned" (it's a horrible word that means nothing):
http://www.nerdfitness.com/blog/2011/07/21/meet-staci-your-new-powerlifting-super-hero/

Staci gained 11lbs in the picture on the right, but many people would say she looks smaller:


And for feeling full eating at your current level, look at more calorie dense foods: eggs (with yolks), full fat dairy, avocados, cook meat and veggies in oil, chocolate, a serving of ice cream if you feel like it.