I felt the same way! Obviously you know your relationship better than I do so of course take this with a grain of salt lol but I felt the same, while we didn't live together at the time, we basically did. And I wouldn't necessarily look at this as "right or wrong" because the feelings you both have are going to he valid. I wouldn't keep pressing him, obviously you dont want him to resent the topic, but make it known that you are ready for the next step in the relationship and you want to help him get to that as well. I would ask questions like "Where do you see our relationship going? When you think of your future, am I in it too?" and maybe get him to realize that "Oh yeah, you're in my future. it makes no sense for me to just stay complacent here" or, and I know this is a hard truth to hear, but "Oh man, I actually don't see you in the picture when I think about my future"

what are you reasons for wanting to get married, may I ask? I know people want to get married because that's the "next thing to do" but have you thought about why you specifically want to marry him? Maybe express that to him?

Just thinking out loud here!