Like a son tuning out his mother's scolding. Or a character being distracted as their friend blabs on about something.
Would it be like:
"Isn't he dreamy? I mean, look at the size of those muscles–"
He didn't mean to ignore his friend. But, watching a wall of paint dry is better than listening to this. He tunes her out as he did watch the wall.
"–Remmy? Are you even listening? I've been talking for 5 minutes here."
Not a great example but is it right to use a dash? At the end and beginning of the dialogue? Are there other right ways?