I don't think I would like to have my own, personal narrator.

"Oh, I'd love to come over this weekend."
She smiled a smile she hoped seemed sincere, praying her voice would not betray her. It wasn't that she didn't like this person; she simply couldn't imagine speaking with this person for more than five minutes. The five minutes were draining enough!
"Oi," She whispered, face turned up towards the sky. "Big mouth!"

I imagine it would go something like that.