Write a gratitude letter to someone you also resent

In complicated relationships, write separately about what you received and what you resent — do not mix them.

Why it works

Genuine gratitude in a relationship that also carries resentment requires emotional differentiation: the capacity to hold two distinct evaluations of the same person. Forcing a single mixed letter typically produces either suppressed resentment or diluted gratitude — neither is useful. Separate writing for each emotional strand allows both to be fully articulated, which is a prerequisite for integration.

How to do it

1. Write the gratitude letter using the four-part structure for what you genuinely received, setting aside what you resent.
2. Write a separate, equally specific account of what harmed you — in a different document, not adjacent to the gratitude.
3. After both are written, ask: "Do I want to deliver the gratitude without the resentment?" and decide without defaulting to all-or-nothing.
4. The resentment document is not a letter to deliver — it is a processing tool. Treat it accordingly.

Evidence

Emotional differentiation — the ability to distinguish multiple distinct emotions in response to the same event or person — is associated with better emotional regulation and psychological flexibility. The separate-writing protocol is an application of this principle to complex relational gratitude. (mechanistic)

The split-writing approach is a practitioner adaptation; the evidence base is from emotional differentiation and flexibility research rather than a studied protocol.

Sources

• Kashdan et al. (2010), psychological flexibility as a fundamental aspect of health, Clinical Psychology Review

Common mistake

Deciding the relationship is too complicated for gratitude at all — resentment and gratitude can coexist authentically, and refusing to express the gratitude because the resentment is also present forfeits the well-being benefit for both.