[ Such boldness surprises her, and it's clear for a moment. But perhaps she should have expected this. Merlin is bold, she has always known him to be; it's something she envies about him. ]
It seems he feels the same.
[ She doesn't like the prickle at her heart she feels to think it. What has she to be jealous of? How many times has she told Gwen she has no desire to be married off to Arthur anyway?
It isn't that. She finds herself sure; it's not Merlin's position in Arthur's heart that she envies.