Haven’t Met Parents

So I have been with my boyfriend for 8 months now. And I still haven’t met his parents, I only met his sister briefly. He said when the time is right & I don’t like to push the issue. But like I sleep over there and sometimes I feel like I’m in high school sneaky around. When we’re grown ass adults. I was thinking about asking again, but I don’t know how to go about it without ME sounding too pushy about it. Or is this normal that I haven’t met his parents? Just want some advice.