It sounds like you are in that dreaded thing called a RUT. A rut, unlike a crisis or major problem is when not a lot of bad things are happening, but neither is there a bunch of good things happening. You just kind of go along, letting life pass, simply co-existing with each other.
The first thing you should do is to find a way to break that rut. Take a week off (even if you can't afford it), and go somewhere together, just to change your daily schedule. During that week, do things together. Find ways to break your daily routine. Now that you are actualy spending time together, start communicating. Nothing can break a rut faster than talking to each other. Find out if there is a reason for why you or your spouse is feeling like you do. Find out if there is a change you can make to add some excitement to your marriage.
OK, now you are actually spending some quality time together, you are making an effort to communicate, and you have discovered that there are some things that each of you can change to improve your relationship. Now comes the hardest part of all - MAKE THE CHANGES. It sure is easy to talk about doing something, but all too often when we get back into our daily routines, we find ourselves falling right back into the same problematic habits. Don't let yourself fall back into the rut. Make some changes. Even if it means giving up something that you like, do whatever it takes to ensure continued quality time and open communication. There aren't any quick fixes to most problems. Invest the time and effort to change what you need to, and get out of your rut.