This is my experience of having been in an unfulfilling relationship. Not the husband/wife type! The moral of my story is just to share the outcome.
Not so long ago, I had a very, very difficult boss. Most mornings, I woke up feeling dread and anxiety because I had to go to work. I asked the Lord why I had to endure such a mean spirited person after having already suffered two painful tragedies. Had I not suffered enough, I asked Him? Then I felt that God wanted to teach me tolerance and patience. "Okay", I said to myself. I will go through the agony of working with this man and I will do it for God. I will work for God's glory. So with gritted teeth, I trudged on. Each time, I had to lean more and more on God but very often also felt so frustrated. I told Him, "I'm tolerant now, I'm patient already, how long is this lesson going to last?". Then, I heard a small voice telling me to pray for my boss. I was like "What?". I was defiant and felt, "no way, lah". I rather bear the hardship than pray for this wicked man.
But eventually, I did start to pray for my boss, I asked God to bless him and I did get to feel better. Not that he had changed, but that I had. I found that God did really want to break my stubborn will.
Today, I am blessed with a wonderful boss. Now I cannot even remember the difficult times I went through. I am so thankful that God touched my life and saw me through the lessons I so badly needed to make me what I am today.