I am going to echo those who find fault with viewing a non-diving wife as a handicap. I have been in this situation for 2.5 decades, and we enjoy planning trips together to make sure each of us can have a great time. The fact that my wife is an avid snorkeler helps. When I certified two old friends a while ago, it added an interesting complexity in that we now plan for 3 divers and a snorkeler, but we have so far managed to have great vacations of that ilk in the Yucatan, Australia, Bali, Palau, Roatan, and Cozumel. We are currently working with a travel agent specializing in dive travel who helped with several of those trips as we look forward to a couple weeks in Fiji.
Two of those last mentioned trips included liveaboards, and we carefully chose liveaboards that went to sites that included snorkeling options. That is more possible than you might think. My wife and I did a liveaboard on the great barrier reef about 20 years ago, and I believe she was in the water more than I was.
Our view of marriage is that both parties recognize the individual needs of the other and seek compromises that keep each happy. If you both have that attitude, trip planning is not all that hard.