Lightly active or moderately active?

Every day, I usually walk between 2 to 3 miles at a moderate pace.

At home, half of my time is spent on my feet.

During the day I am out at school or doing light activities most days of the week.

I also do aerobic activity 2-3 times a week (running, aerobics or zumba) for 30 mins to an hour at a time.

I think I am moderately active, as many websites suggest my walking alone is considered moderately active. However, since finishing a diet a few months ago I have been sticking to a lightly active diet and I think I have been losing weight slightly, as clothes are looser and my body looks thinner. I feel great but I want to stop now, but I am afraid I will gain weight if I increase the amount I eat by 200 calories.

Should I change the amount I eat, or keep it the same?