treatment for depression also help with bulimia?

I’m not sure if my bulimia feeds off my depression (no pun intended)
do you think if my depression is treated my bulimia will be easier to fix?

yes, if your depression is treated then you won’t constantly think that you need to throw up and you won’t feel the urge to be bulimic as much. if you treat your depression then youre bulimia will probably get better.