Tell her to define spirituality.
" if you left my relationship with God a private matter."
Where does this whole idea of a relationship with God come from? Sure Jesus is supposed to bridge the gap, the division, between Jehovah
and sinful humans, so humans can have a relationship with Jehovah where they could not before. But that is the theological principle of the atonement, not a 'you must do' thing.
"(I haven't hung out with a single JW friend in months, possibly a year or more"
Tell her you don't have time for hanging around people. More important things like career and making money.
But avoid doing what Island Man said and bringing up the False prophet and Pedophile issues. Don't make it an 'attack the Watchtower' issue, make it a 'It's my life and I want to take it back and live it' issue.