Masturbation.

Lily-Anne
My partner makes me come every time we sleep together, yet as soon as he's gone, I'm always masturbating! 
It's became a ritual of sorts for me, I've been doing it for so long it's beginning to seem more like a comfort thing. 
Is this okay? 
My partner knows, but I don't want to tell him how frequently as he will think he isn't good enough (I know him) and will become disheartened. 
I'm not a bad person am I? I just never feel sated sexually unless I masturbate