Whirlwind, before eating pizza out with your friend, how about if you say something like, "Maybe should should just get back to paying our own way." I bet he'll say, "Okay" and that will be the end of that.

You shouldn't be paying for his extra slice all the time. You could go out another day a week if you weren't paying for him, or you could save the money.
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Founder Emeritus of Boomer Women Speak and the National Association of Baby Boomer Women.
www.nabbw.com
www.boomerwomenspeak.com