I run high level track and field, but for some reason I'm not losing weight. I was 125 before I started running, but ever since I started I had grown taller and gained muscle. Is there any way I can lose a little more weight?
You should get your body fat percentage checked. Its not necessarily about your weight as much as it is about your body fat percentage. If it is in the fit range or healthy range then you are just fine.
If you want to lose more weight, you are going to need to look at your diet and what you can cut out. Cut out portion sizes as well as junk food/soda etc if you eat them. Try a 1500 calorie per day diet. Try adding in some strength training too- weights and resistance. You don't really want to lose weight as much as you want to lose fat and gain muscle.