Ok, this is a simple math problem, but the fact that you don't know what your calorie intake is seems to be the problem.
Whether you eat 3 times a day or 10 times a day doesn't matter, its how many calories you consume in that day that matter.
Create a fitday account (
FitDay - Free Weight Loss and Diet Journal) and put in everything that you eat in a day, and I mean everything, even the one piece of chocolate you ate on your way out the door. Log your weight and your calories for a couple of weeks.
Now reduce this calorie amount by 500 per day.
Keep doing what you normally do but with this 500 calorie defecit, and you should see the fat come off.
It takes 3500 calories to burn 1lb of fat. By reducing your daily intake by 500 calories you should aim to reduce about 1lb a week.
There is a more scientific way to do this, but I will need your height, weight workout routine etc. This is a pretty good rule of thumb to work on.