What is Reddit's opinion of Marriage Fitness: 4 Steps to Building & Maintaining Phenomenal Love?

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You need professional help... pronto!!! You need to see a therapist who is a friendly to marriage whom can guide the two of you. Most therapists are individual therapists: "follow your heart" kind of mentality. The couple is the client instead of the marriage being the client. It's a different mindset. You need a therapist who won't give up on the two of you.

Here's a site that lists this kind of therapist all around the country: https://www.marriagefriendlytherapists.com/

After 15 years of marriage, you probably forgot how to love your wife- and perhaps she forgot how to love you too. Love is just not a feeling; it's an action/verb. So I recommend reading the book Marriage Fitness by Mort Fertel. It lists what each of you need to do on a daily/weekly/monthly/etc basis to maintain and strengthen a marriage. They're really all simple common sense things but it opened my mind when I read. (Unfortunately it was too late for my marriage, but it may not be too late for you since the two of you may both want to work on things.) Daily things include touch each other at least 5 times a day (a hug, a hand on a shoulder, etc), calling each other in the middle of the day for 5 mins, etc. Weekly things include mandatory date nights, business meetings to talk about non-relationship, financial, family planning things in order to get all/most of the non-fun things of marriage in one sitting, etc.

https://www.amazon.com/Marriage-Fitness-Building-Maintaining-Phenomenal/dp/0974448001/ref=sr_1_1?s=books&ie=UTF8&qid=1507643244&sr=1-1&keywords=mort+fertel