I'm sorry I don't have much to add since I'm not engaged or live with SO.
I'm fighting moving in together without being engaged. But I'm having trouble balancing baby making and engagement to move in and eventually marry.
With baby making I'm going up against mother nature so I feel like I have to move fast IF I want a child no matter if we stay together or not.
With the engagement, it seems more of a heart and smarts kind of decision and well, at my age, I can see myself having a baby first sad to say.
I'm still fighting it though....