At the risk of sounding utterly unromantic, I've been with DP 18 years and really for the sake of the kids it would be simpler if we were married.
I just feel very meh about it- I know lots of people getting married/ engaged in very romantic ways and I don't feel like that anymore. I see it more as an admin task 
Aibu to think that this is either a sign of me not really wanting to marry my DP at all or that after all these years, it's common to feel this way?