Long-distance couples are often more stable while they are separated than after they reunite, according to peer-reviewed research summarised in a 2026 review of relationship data. The counterintuitive finding is one of the most striking in the current literature on modern relationships: distance forces couples to communicate deliberately, and the reunion removes the structure that kept them close.
The same review reports that couples who stayed together six years after their wedding responded to their partner’s small “bids for connection” 86% of the time, versus 33% for couples who later divorced, a finding from Gottman Institute research. And 36% of ever-married US adults describe their marriage as “very happy,” a figure that has held steady since the General Social Survey began asking the question in 1972.
What the numbers say about single life
About 30% of US adults are single — not married, not living with a partner and not in a committed relationship — according to Pew Research Center, with 47% of under-30s single compared with 21% of 30- to 49-year-olds. Of single Americans, 57% are not currently looking for a relationship or casual dates, while 42% are looking for some kind of romance.
The practical takeaway
For couples about to close the distance, the research carries a warning: plan the reunion as carefully as the separation. The habits that kept a long-distance relationship strong — scheduled calls, deliberate check-ins, making time for each other — do not survive on their own once the couple shares a postcode. Keeping them is the work, and the couples who do it are the ones who stay together.
The research also carries a warning for couples who have just closed the distance. The habits that kept a long-distance relationship strong — scheduled calls, deliberate check-ins, making time for each other — do not survive on their own once the couple shares a postcode, and the studies suggest the reunion is the risk point, not the separation. Couples who keep the structure tend to keep the relationship; couples who let it slide find that living together exposes differences the distance had hidden. It is a useful reminder that proximity is not the same as closeness, and that the work of a relationship does not end when the miles do.
