I'm going to respond a little differently than most of the other comments. While, yes, I think having date nights is a good goal, and they can help, one commenter mentioned a rule for those dates... not discussing the kids.
That, in my opinion, in many ways, is a nod in the right direction...but not really the end-all-be-all. I don't know your situation (working or stay at home, etc), but what I discovered through time (just celebrated 20 years) is that it isn't so much whether or not we talk about the kids, or even whether or not we get away/go on a date/leave the house... that has the most impact of staying *in touch* with each other. It's remembering that we are more than *just* our kids' parents. More than *just* one of this family we've created who is doing everything "for the family."
Reconnect by having something to talk about. As a SAHM for many years, there have been many periods of time where ALL I felt like I had to contribute to conversation with my spouse was what needed to be added to the grocery list, how the kids were doing at school, and what needed doing around the house, or had gotten done around the house. Generally mundane things that were more "status reports" and updates than real, meaningful conversation. Having an interest that helped me remain a separate person (all while being an integral part of our family) made a difference. The times I took up a new activity (became a runner, learned to sew, decided to get back in the job market with a part-time job, joined a book club--with my spouse!) opened many new avenues of conversation that had been missing. Places to discuss hopes/dreams, wishes, ideals, discomfort with myself, or pride in accomplishments, that had nothing to do with how well the kids were turning out... a source of concern for every parent.. where you learn to identify how you're doing in life by how your kids are turning out... and the older you get, the more you realize how you can't control their outcome as much as you thought.
The times I felt worst, were when I had none of those outlets for myself. When I got up and made his lunch for work, sent him off, got the kids off to school, and sat here feeling like I would have nothing new to discuss when he came home--and didn't--unless we were in the mood to discuss politics--which can be stressful and not a good fall-back discussion if you are stressed in your relationship! Discussing a book we were reading together (with a larger group) gave us conversation about the subject matter, about the other group member's views on same, a place/time to get out of the house together, something that excluded our kids, and reminded us that we're friends, and we each have intelligent thoughts about abstract matters...I'm way more than making dinner and doing laundry. And he's way more than the guy who disappears for 8 hours a day and comes home grumpy sometimes.
When I took up running (seems like an impossibility with young kids, I know... but gym time of some sort maybe?) I had a new realm to explore and to discuss. He was already a runner. And we almost never run together (not similar ability). But he was able to encourage me, talk about his struggles with it, his joy in it, and I was able to do the same.
And so on.
It isn't just carving out the generic "time" for each other. That's sometimes no better than not having any time, if you discover that you sit there with nothing to say to each other.
So, find something that interests you, do something out of the norm (doesn't have to be anything crazy, either), AND find time to have conversation with him. Encourage him to try something new. And then SHARE with each other.
Eventually you will be sitting with wonder, awe, and fear discussing your kids moving out and into the next phase of their lives as young adults. It's scary. And a comfort. To know it's your old friend across the table sharing the same hopes and dreams for their future. And to also know you are both more than how your parenting has defined you. So, sure, try not to talk about *just* the kids... when they are small it may be easier to try to make it a rule... but as they grow, it's ok. Some of your deepest fears and worries need to be aired and shared with one another... and will stem from your children. And you will use those moments to comfort one another, and will grow closer in the process.
Good luck to you. It isn't an easy road. There's work involved. And it never stops. But it is cyclical to some degree. You can't fully appreciate the ups without any downs. My husband likes to say that relationships are never stagnant. Never. Either you are improving them, or they are disintegrating.
Sounds like you are choosing the improve. Just have to keep choosing it every day. :)