If you read His Needs Her Needs, you'll learn that you need to spend 10 to 15 hours a week with your spouse, to stay in love. And of course the first thing people say is 'but we have kids! how can we ever accomplish that?!!'
I used to have a list - lost it on one of my computers - of things you can do to 'date' your spouse without investing a ton of time. Things like get up 15 minutes earlier than the kids and have a cup of coffee or tea together before you leave for work. Set up a jigsaw puzzle in the living room, and every time you have a spare 5 minutes, just sit down and work on it together. Start a veggie garden and, each night, go out and weed it and pick veggies together. Fold towels together. Wash the dog together. Fill out a crossword puzzle together. Have family game night each week. Walk the dog twice a week and just talk. Make sure you text or call each other at least twice a day. Join a babysitting co-op so you have a have one night a month free while the other nights you play with the kids over at your house.
Be creative. You can find ways to be close and together and even intimate, even with kids around.