The request you decline does not erase the help you have already given.

Saying no once tends to feel like it cancels the record. You picture the person walking away with only this moment in mind, as though the times you showed up have suddenly stopped counting. That fear is what turns a reasonable limit into an argument with yourself. In most real relationships the ledger is longer than one refusal, and the people who forget that quickly were not keeping a fair ledger anyway.

When you decline something this week, resist the urge to over-explain or to offer a substitute you cannot afford. A plain no, said warmly, is complete. Let the history of your help speak for itself.