It's very very true - I waited a long time and went through a lot of crap (and watching everyone younger than me get married) to find Steve and now that I have, I'm never letting go...in your spouse you have your soulmate, best friend, confidante, lover and everything in between. Once you have that, and realise it for what it is, you treasure it and never want to lose it.
Quick tip - never lose the romance in your marriage, coz feelings fade in and out over time and you need foundations to build upon when the going gets a little tough. Honesty, openness and lots of talking - also never go to sleep on an argument and show each other how much you care every day as often as you can.