I'm in a somewhat similar position: gave a loan to a regular who needed help, had a falling-out, never saw her or my money again. Fortunately she can't "out" me, I didn't give her enough info for that.
Because she was paying me back with bookings rather than cash, I think she began resenting being obliged to see me, so she kept putting me off.
Never lend money to a prossie, even if you both get along: it just causes resentment. That lesson cost me £900.