Decline an invitation without damaging the friendship

Write a polite decline.

Event: [details]
Why I'm saying no (high level): [optional]
I want to suggest another time: [yes/no]
Channel: [text / email / formal RSVP]

Ask me up to 3 short questions first if anything important is missing. Wait for my answers.

Then:
1. A warm sendable no.
2. An optional rain-check line.
3. Over-sharing excuses to leave out.
4. A firmer version if they push.

Only use what I've told you, leave blanks for anything I haven't given, and don't invent facts, quotes or what the other person thinks. Give a sendable version and, when I've pasted a vent, a one-line note on what you left out and why. This is help with wording, not legal advice. UK English.

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