Decide Whether This Relationship Is Worth Fighting For

Something that matters, a partner, a friend, a sibling, is in real trouble, and you keep circling the same question at 2am. This applies a three-factor test: what the relationship was built on, whether the other person can actually change, and what trying costs against what leaving does. Then it makes you decide.

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A relationship you value, romantic, friendship, or family, is in serious difficulty and you are not sure whether to invest effort in repairing it or to accept that it has run its course.
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<task>
**Apply a three-factor test:**
1. History and foundation: was there genuine mutual care and respect at the base of this relationship, or has it always had a fundamental problem that you overlooked?
2. Will and capacity: does the other person have both the willingness and the capacity to repair the relationship? Desire alone is not enough if the behaviour cannot change.
3. Cost of trying vs cost of leaving: what is the realistic cost of a serious attempt at repair, and is it proportionate to what a healthy version of this relationship would give you?

**Then decide:**
4. If all three suggest the relationship can be repaired: name the one conversation or action that would be the honest test of whether repair is possible
5. If one or more suggest the relationship has genuinely ended: name what you are grieving and what staying or trying further costs you
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<output_format>
- Three-factor assessment: one paragraph each
- Decision: one sentence
- Next step or grieving note: one paragraph
- Length: 300 to 400 words
- Tone: honest and direct
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