Divorce often happens in year 6 to 10. research finds year 8 to be ordinary. In the 50s, it was called "The Seven Year Itch'. If your relationship is struggling in these years, it is an ordinary development. The essence of real love is wanting to be a better person. When someone turns their back on doing the work of change and growth, that's what repair of a relationship requires, then they are unwilling to do the work of real love.