A fundamental assumption underlying the formation of our most important
relationships is that they will persist indefinitely into the future. As
an acquaintanceship turns into a friend- ship, for example, both members
of this newly formed interpersonal bond are likely to expect that their
interactions will become increasingly frequent, diverse, and intimate
over time. This expectation is perhaps most apparent in romantically
involved couples who, through a variety of verbal and symbolic means,
make explicit pledges to a long-lasting relationship. In either case, it
is clear that these relationships represent something valuable to the
individuals in- volved and are pursued with great enthusiasm. Virtually
all close relationships are formed within the context of mutually
rewarding in- teractions and/or strong physical attraction between
partners. Friends and romantically in- volved couples alike are drawn to
one another because of similarity of attitudes, interests, and
personality and, quite simply, because they enjoy one another's company.
This enjoyment, cou- pled with the novelty that characterizes new
relationships, almost makes the continuation of the relationship a
foregone conclusion. As relationships progress, however, their novelty
fades, conflicts may arise between partners, negative life events may
occur, and the satisfaction that previously characterized the
relationships may diminish.