Dear O.,
I'm not willing to discuss my weight management or other health issues with you. I'm not interested in having you teach me how to grocery shop or cook - I already know how to do those things. If you're looking for someone to be a life coach for, it will not be me. I'm sure you can find someone else who would like that kind of help once you start looking. If you decide to take early retirement that might be an effective second career for you. But it will not be me.

Thank you for the offer,
Your friend who's still watching every dollar these days