Hey Gabriellee,
I am also trying to lose weight and if there is a McDonalds in that mall, you can always order their caesar salad with grilled chicken. (It's Delicious! and only about 400 calories.) I also go to school at the same times as you.
This is usually what i eat every day.
Breakfast:
1/2 Whole wheat Bagel, 1/2 Cottage cheese, or sometimes i would spread some cream cheese on bagel instead of cottage cheese.
Lunch:
Depending on where i go,
Panera Bread: Ill get a chicken ceasar salad with an apple for a side, and water. around 500 cals.
Noodles & Co: Small Penne Rosa, Pad Thai, or Indonesian Peanut Sautee 300-500 cals
Subway: 6 inch turkey on whole wheat with Light Mayo or other special sauce, Lots of veggies. Nothing on the side, Water.
Chipotle: Small Side Salad and 1 soft taco with no cheese and light sour cream, with black beans, corn salsa, tomato salsa, and maybe a little guac

Really, you can eat small kid side things, and try and avoid white breads, tortillas, etc . Avoid processed foods, and drink a glass of water before you eat to make you feel more full.
Dinner:
Grilled chicken with brown rice, or yummy low sodium, low fat soups.
Desert:
1 cup Fat Free (Eating Right Brand) Cherry Chocolate Chip Frozen Yogurt (Add other fresh fruit) in a cup.
I hope I helped, if you want more advice, just go to page, add me as a friend and send me a message. I used to be really fit, until i got sick and had to take many medications, so i know what you need to lose weight.
Oh and the only way you can lose weight more quickly is exercise.
Good Luck!