Riding my boyfriend!!

Ok so my boyfriend loves it when I go on top but when I do he pushes me down so it goes really deep but then wants me to ride him. I'm still yet to find a way to ride him on top and still make it go deep? 
He tells me to go faster and when I do he will grab my hips and make me go deeper by still want me to go fast which is hard- hoping this is making sense haha!! 
Does anyone have any tips or ways to try it?