You did nothing wrong. Pat threw you under the bus by getting Myra involved and since she was so upset it makes me wonder why since this wasn't her love interest anymore. I'm thinking its all for the drama of it all. Myra isn't your friend so cut that one out. Pat also isn't your friend to delete that one too.

I would get out your phone with your gf and let her read through exactly what you said to Pat. Then point out that both Pat and Myra were horrible to you. If gf sees the whole picture instead of just the piece Myra is showing it'll be find.