Answer:
"Empty Love"
Explanation:
Based on the research conducted by Robert Sternberg, this situation is referred to as "Empty Love". This occurs when a strong love or connection between a married couple falls apart over the years. Usually from emotional trauma, which leads to a lack of intimacy which most of the time leads to hatred between the couple.
In some cases relationships can also begin as "Empty Love" where two people barely know each other and stay because of some commitment and eventually end up developing feelings for one another.
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