Questions about example sentences with, and the definition and usage of "Emotionally"

A: means a person is characterizing intense feeling

A: He was emotionally unavailable.
He was emotionally unstable.
It was emotionally disturbing to watch.
He hurt her emotionally.
I’m both physically and emotionally exhausted.

A: Simply put:
Emotionally is describing how you feel.
Mentally is describing how you think.

A: "Emotionally" is about how you feel, and "mentally" is about how you think.

"He may be an adult mentally, but he's emotionally a child. He'll throw tantrums like a little kid!"

"He's very emotionally balanced, nothing upsets him, but he's mentally, well... a little slow. Not very intelligent."