Hi, Lisa,
So you want to be out and about, rather than at home. Good idea, it's good for your mind and your attitude. I'm not sure if you've read Ernie Zielinski's, "How to Retire Wild, Happy, and Free." It's thought provoking, at the very least.
Others have mentioned several things, I'll repeat and augment (I retired in mid-2009 just for reference). Retirement is a process. You need to discover those things that intrigue you. Travelling with your husband is one, but it sounds like you need to be with people. So:
Meetup.com - in your local area, walking groups, movie clubs, travel groups, meet for coffee groups. Check it out.
Certainly local colleges and universities offer classes that you might be able to audit. Google Lifelong Learning, there are two that I know of Lifelong Learning Alliance, and Osher Lifelong Learning. They offer classes for seniors, often less than a full quarter, no books, no papers, no tests. Come curious and participate. I've been studying Geology since 2009, but often intersperse it with current affairs, literature, and history classes.
If there is a gym nearby, join it, and go frequently - you'll meet many people. If you have a Medicare Supplement or Medicare Advantage plan, many insurers offer gym memberships as a part of your premium. You'll feel better too (or at least I do).
Volunteer - this is the part where your passion comes in. Google the local United Way, their member charities can post openings for volunteers. I often help out at pledge drives at the local NPR station, do a little work for my faith-based organization (when it moves me), but my passion is the local humane society. I take pictures and write descriptions of the dogs that are ready for adoption. Then I talk with the other volunteers about the ones we worry for the most, and cheer when they get a new home.
You'll find what interests you, approach it slowly, and soon you could be spending a lot of time doing things outside your home, and making time for the things you and your husband like to do. The difference between work and this: you don't have to do any of it if you don't FEEL like it.
Rita