Advice On Quitting Constant Snacking And Fear Of Hunger?

i m a 17 year old female. im not overweight or underweight, I have a healthy BMI around 18.7. I don t really worry about how much I eat, or haven t until the past few months or so.I realized that I don t stop eating from the time I eat breakfast to when I got bed. I m either eating a meal or im in my room with a bowl of dry cereal, popcorn, or another processed food to eat as I do homework and I refill every time it empties. I know my weight is healthy now, but I also know if I continue this I will struggle with my weight later on. It s almost as if im afraid to not have food near me, so maybe im afraid of being hungry. How can I get myself to stop eating constantly, all throughout the day? You might suggest to drink water, tea, or other drinks. Trust me, I do. I drink at least seven glasses of water a day, as well as multiple cups of tea and sometimes a diet soda. Also, distracting myself isn t such helpful advice either, as I get loads of homework to do each and every day. I do exercise the recommended amount, but im still steadily gaining weight. Any advice to quit my constant snacking and fear of hunger? im afraid I might be at risk or have Binge Eating Disorder.