I can't lose fat!

Sure you can lose fat. Stay in a calorie deficit. Use this app to log every single piece of food you put in your mouth. Even better, weigh it on a food scale first to be sure of the serving therefore giving you a more accurate calorie count. Do this for weeks and weeks at a time.

Your post is kind of general...how long have you been working out and dieting? What type of workout and how often...what kind of diet? What is your height and what was your weight when you started out and what is it now? All of that type of information is necessary in order to give any proper advice

Increase your cardio, keep your calories low and rework your diet. Eating low cal is good but if your eating junk then that won't help you.

Also, switch your workouts up to keep your body guessing to keep yourself constantly challenged.