In the early 1990s, I got something like $80 worth of RPG books for about $20 from a guy who was giving up playing because his new girlfriend said he had to stop and get rid of all his stuff.

That's tragic! :(

"Your mate John's behaviour skeeves me out, so if John is going to be in your roleplaying group, can you please have roleplaying games at [location that is not the house we share as a couple]"

is a reasonable request;

"Give up roleplaying games" is not.