I've basically gone from one extreme to the other, living as a single man for my whole life to now sharing a place with my GF, and all I can say is it'll work if you want it to.
I mean for me I have to REALLY want it because any time I get complacent she lets me know in some subtle way. The way I see it we're meant to live and love in life so go for it! Jump right in or something.... _______________________________________