"That's why my world seemed to be crumbling around me--because I did not build my life on a firm foundation! Our emotions and our desires change--God never changes! Right before the Christmas holidays, I committed that I would no longer put anyone nor anything above God and that my greatest desire will be to God alone."

Great to hear. Wonderful word. My story is the same except it was my wife who took off. She is onvolved with internet and phone sex.
I had also put my wife first, though she started to take me for granted and came to desire "excitement". The marriage was flotsam.
Anyway, I've been commited to Christ for some time. In my walk at least I've prayed that God make me the person He that he means for me to be. Though I prayed for this I knew deep down that the process would be painful - growth never is easy - and that he would have to strip away things I hold dearly. In essence I must be broken.
My wife's desire for a divorce broke me. It was sudden and out of the blue. On the night she gave me the news she admitted she had no good reason for walking out. But she said I "had become too content" (her words) and that she'd never get the things she wanted out of life. We actually live pretty well, though we're not as affluent as other people in our town, which is the most wealthy communities in the region. Our lifestyle was fine at first but as time went on my wife became obsessed with the things we didn't have - new SUV every year, spontaneous trips to Europe, limitless discretionary spending. She became covetous and envious.
Anyway, I realized that to a great extent this is something I had asked for. My wife was not becoming impatient with my focus and couldn't take it anymore. At 47 she saw her life passing away and she'd never live like her parents or the Jones' across the street so she bailed out. Long term it was for the best. It was/is stressful living with an ungrateful, unhappy person. She also talked a lot about wealthy people and how good they had it. We have household income of $180,000. We were unequally yoked. There were other issues but no marriage breakers.
Rather than dwell on the pain I focused on what God wanted me to learn from this. I may not have given my life all the material things but I did put her first and removed God from the throne. Divorce has brought about deep changes - most of them for the better. You are correct, I am now able to realign my life with God at the helm. It's enabled me to come to terms with my wife's decision and emerge from bitterness. It's been 8 months and I'm alright. I'm actually nervoous about the future but also excited because I am growing and am moving into a new life with God as my guide.