How should I bring it up...

I don't know how to bring up the conversation of us getting married. I would love to get married, we have two daughters together. I would like to refer to him as my husband not my boyfriend while talking about couples. I've read about couples wearing wedding bands and not being married (here in the <a href="https://play.google.com/store/apps/details?id=com.glow.android">glow app</a>) I wouldn't not feel true to my self (nothing against couples that do it). I just don't know how to bring it up to him.