Paying off debt can be a grueling process. It's often the same thing, different day. You are waiting around for payday, crunching numbers so that you can pay off the most debt, being über careful with how you spend your money and working more than you're used to working. Sometimes this can wear down a person, and it certainly affects a couples' spark.
Paying off debt is NOT an excuse to let your relationship dull. It's this time in your life where a significant others support can make or break your journey. Building a better life for both of you is an essential part of this process, but it doesn't work if you're both miserable.