The scale says I'm not losing weight but my close DO feel a little looser. What gives?
Yes, going by how your clothes feel is the best... If you're exercising more, you may gain weight in muscle mass though you're burning fat. Or if you're eating less sodium you won't be retaining as much water.
Cutting out junk food is a good diet plan, but keep in mind that you need to have some sparingly occasionally or it will be very difficult to keep up, from my experience.
Eating lots of lean meats, fish, fruit and vegetables is great. Drink lots of water! It helps keep you full and cuts out empty calories from juice, soda, etc. Eating small meals/snacks often is what you need to do, as was mentioned.
A friend of mine is having a lot of success with a gluten free diet... she cuts out all gluten products. So no bread or desserts with wheat. For breakfast she eats plain yogurt, grapefruit, and bananas. Lunch usually salad, rice, fish...
Good luck and I'm sure you will look great for prom!