It is a mystery whywe fall in love. It is a mystery how it happens. It a mystery when it comes. It is a mystery why some love grow and why some love fail. You can analyze this mystery and look for reasons and causes, but you will never do anymore than take the life out of the experience.
Love is more than the some of the interests and attractions and commonalities that two people share.
And just as life itself, it is a gift that comes and goes in its time. The coming of Love must be taken as an unfathomable gift that cannot be questioned in its ways. When they fall out of love or the person they love feels the spirit of love leaving, they try desperately to reclaim the lost that is lost rathen than accepting the gift for what it was. They want answers where there are no answers. They blame their circumstances.