[He was a little startled by the blush, until he realises all of a sudden that he has been jealous, and the thought gives him a little warm rush of pleasure, more so than it probably should being an alpha, but the idea of Eggsy being just that little bit possessive, of being jealous of even his previous lovers (albeit imagined ones) it made him feel wanted, it was a feeling he liked. He wasn't so much of a pushover he'd stand for too much of it, of course, but the thought was definitely enough to make him smile.

He leaned in without even thinking about it and pressed a kiss to Eggsy's lips]

You're the first person I've ever introduced to them. [he hopes Eggsy understands how important that makes him]