Best friends now dating
It's crazy because being best friends isn't always romantic. So you're not embarrassed of embarrassing things.
Obviously you know that he likes hanging out with you, so you don't have to interpret vague texts or lament with your girlfriends about the issue. By dating your best friend, you've already moved past all of the "getting to know you" awkward parts.
But we were never lonely and never afraid when we were together.” Hemingway from A Farewell to Arms.
If you've used the phrase "Oh, he's just my friend!
Also awesome on you and your wife - my sister and her husband were best friends for years first. Remember, it's easy to jump on the /r/circlejerk wagon when it comes to complaining about your SO. Every night when the kids go to bed, we discuss together what we are going to do (mostly read or watch TV which isn't very exciting, but we do both of these things together) because we want to be near each other all the time.
Make sure they are "advocates for your marriage being good and strong." Not just people looking to stroke your ego, even if you're wrong. I get my alone time when he is there, and to me, that is the best thing in the world.