I don't drink soda, never have.
I drink water all the time.
I usually eat 6 small meals a day.
Exercise is not only good for weight, but good for the heart and cardiovascular system.
If I just eat fruits and vegetables and no protein...I will be starving. What you are describing sounds very much like the starve/binge cycle.
I think maybe eating might have to do with my emotions and other things. How I wish I could just be like you, Slickness and just be naturally thin!!!! Even at my thinnest (size 3/4), I still had curves and a ghetto booty.