So my boyfriend.....?

When i first met my boyfriend he was slender,(he wasn't my boyfriend at the time)looked really awsome, very gorgeous baby face, then he started working out n doing steroids, he had gotten so big. He had stoped for a while after we started datin n got really nice lookin again his baby face came back, but now he says he's too small and want to go back on steroids again. I don't really want him too... What should i do?