Behavior
Most Friendships End Without a Decision
Friendships are held together by ongoing inputs — shared proximity, unstructured time, reciprocal attention, and low-cost opportunities to be present.
Source
Claim this source supports
“Closest ties are fairly stable year to year, roughly 1 to 4 percent annual change among top contacts, with turnover concentrated in younger adults and around major life transitions such as family formation between ages 25 and 35”