You don't need to feel full in order to give your body the fuel it needs.
I made this video, thwarting one technical difficulty after the other, to prove a point: You can eat five meals a day, while keeping the calories down, all while providing your body with the fuel it needs in order to sustain your life functions. You don't need to feel full in order to give your body the fuel it needs. You should be drinking plenty of water. That may help you to feel somewhat full without negatively impacting your goals, but feeling full should not be your goal. Providing yourself with an adequate amount of healthy food should be.