Marriage and babies

Sheriece • Conceived in December/January . Miscarried in February . Hoping to try again soon .
Okay , so my boyfriend and I have been together going on 7 years .. Well sort of because when we first started dating I was underage and my mom didn't exactly like it and my phone got shut off and we moved a lot .. Well we are back together now that I'm 19 (got back together a month before I turned 19) well we are trying to get pregnant .. And we both want to get married but he keeps telling me not yet .. The thing is he says that when I get pregnant he plans on asking me to marry him .. My question is why isn't hasn't he already ? We both know we want to spend the rest of our lives with each other .. It's just confusing me on why he hasn't asked .. And I don't want to be rude and ask him myself ..