What does Ay Dio mean in English the context is a girl upset with her bf?

"Ay Dio" is a Spanish phrase that literally translates to "Oh God" in English.

In the context of a girl being upset with her boyfriend, it likely expresses a combination of:

* Frustration: "Oh God, this is so frustrating!"

* Disbelief: "Oh God, can you believe him?"

* Exasperation: "Oh God, I can't deal with this right now."

It's a way to express strong emotion, particularly when feeling overwhelmed or disappointed.