Friend ghosted me after I invited another guest to her birthday dinner

DEAR ABBY: I invited a friend, “Sybil,” to dinner at a fine dining, special occasion restaurant to celebrate her birthday. About a month before, I called to say I had also asked someone else to join us, as it was also her birthday. I thought the three of us would have fun, as we rarely go to fine dining establishments.

I was the host, so I said that I would pay for all of us. Sybil said she wouldn’t go unless I “uninvited” the third person! A week after I refused to do that, I received an email saying “leave me alone” after I’d unsuccessfully tried to phone and set up an alternative date to celebrate, but at a less expensive restaurant. I could not afford to host two fine dining nights out.