Where does friendship fit in Sternberg's triangle?

Close friendships are primarily intimacy—deep knowledge, vulnerability, and connection. Passion is minimal or absent (no romantic/sexual excitement). Commitment varies: casual friends have low commitment; lifelong friends have high commitment alongside intimacy.

What's the difference between liking (Sternberg) and friendship?

In Sternberg's terms, liking is intimacy-only. Friendship is broader: it can be intimacy-only (liking), or intimacy plus commitment (companionate love applied to friendship). Close, long-term friends often have both dimensions.

Why do some friendships last and others fade?

Intimacy must be maintained through regular contact and vulnerability. Friendships fade when either person stops investing in the relationship. Committed friendships (where both people prioritize them) weather distance and time better than casual ones.

Can friendship become romantic love?

Yes. If two friends already have high intimacy and one develops passion, romantic love can emerge. This works best when commitment is also present. Friendships with passion but no intimacy development are riskier (likely infatuation).

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Sternberg's Theory Applied to Friendship: Why Close Friends Matter

Peter Kolomiets

|April 8, 2026|Updated Apr 13, 2026|7 min read

Sternberg's Theory Applied to Friendship: Why Close Friends Matter

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References

Sternberg, R. J. (1986). A Triangular Theory of Love
Laurenceau, J. P., Barrett, L. F., & Pietromonaco, P. R. (1998). Friendship Quality in Adult Development
Sprecher, S., Treger, S., Wondra, J. D., Hilaire, N., & Wallrab, D. (2013). Self-Disclosure in Friendship Formation

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Sternberg's Theory Applied to Friendship: Why Close Friends Matter

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