Just ask already!

So I've been with my boyfriend for a few years now. House together, I have a kid from someone else, but he is practically her father. Anyways..we have talked about getting married in the past and we both want to. Theres nothing holding us back, but he just WONT ASK!. I'm frustrated because it is definitely time for the next step in our lives, but we cannot take that step if he never asks. Should I talk to him about it? I feel like if I bring it up, itll turn him off.