harrigran
I know someone who sends a vague reply and leaves arrangements to me so I send a message with date, time, venue and what time we will be picking up. If I don't get an ? or a proper message I resend it a day or two later.
I have three friends like that, harrigran. We used to meet up regularly for lunch (before lockdown) but it always seemed to be me who arranged it, co-ordinated it, booked etc. One never turned up the last twice. Since lockdown I kept in touch with the others but one of them never phones me so I've concluded she just isn't bothered. Thank goodness for the other one!
Of course when all this is over she might phone and ask if we're meeting up (and can I arrange it!)