Over many years of marriage, the spouses develop different interests or values. If partners do not find new common interests, they are likely to grow in different directions. The main reason is that familiarity breeds contempt.
A decline in emotional and physical affection following years of marriage creates a void, leaving both spouses feeling lonely. This also happens to couples who share the same values.
Many couples may feel sad and lonely even while still living under the same roof. They may struggle to find their way back to a shared path like during their dating and honeymoon phases.