Generate a metaphor to describe the given concept.
Weakening of a friendship
The weakening of a friendship can be likened to a fraying thread, once strong and tightly woven but slowly unraveling as the individual fibers begin to loosen and separate.
Complete the following task based on the instruction and optional input provided.### Instruction:
Generate a metaphor to describe the given concept.

### Input:
Weakening of a friendship

### Output:
The weakening of a friendship can be likened to a fraying thread, once strong and tightly woven but slowly unraveling as the individual fibers begin to loosen and separate.