Hello, I am not married. But, as with any other trial you must pray, praise, and fast your way through.  I really believe that if you do these things God Will change the state of your circumstances.  Now when it comes to lack of motivation, you must Press.  When you absolutely don't feel like it you must press and sit down and pull out the bible.  If there is nothing in particular that is in your heart to read, then read about your situation. (If there is no concordance or anything of that nature to help you research your situation try the bible search on this website or, try bible.com or biblegateway.com).  Anyway, after pressing, you will see the Lord will inspire you to read more.  Talk to the Lord about the situation.  You have to press, the more you talk to Him about it the easier it will get over time and then when you start to see changes in the situation that will only motivate you to talk and fast and pray about the situation.  You also should watch what you watch.  Watching sappy love stories, or any show on this subject can feed your depression or provoke that emotional response.  You have to press, praise, pray, and fast, and watch God turn this around for you.  Don't focus on Goliath focus on the almighty God.  I pray that this helps you and I believe that your situation will change.