I have to say, despite my post just above, I understand you. Before I met my current boyfriend I thought I might possibly end up as a spinster, and wasn't worried about that. I kind of assumed that if I was meant to meet someone it would happen, whether at 20 or 50. I never considered myself as maternal either, but oddly, even though I'm only 21 and don't want babies until I'm at least 30, since I've met my boyfriend I've realised that I wouldn't be complete without children. His children.
I've put the bit about being in it for life in bold, because I agree with that 100%. I see divorce as failure to be honest, and if there were arguments I'd want to be able to work through them, so I'd only be able to marry someone who I had a deep emotional understanding with.
To be honest, before I met my boyfriend I was totally ready to emigrate to France or Germany after my French degree, and I would have been happy to live an exciting international lifestyle pursuing an exciting career. Now I won't be. There's always a compromise.