[ The thing she really needs to understand is that she has the upper hand. She always had. She's his first, even if he didn't remember her back home. She's the first and only and although he loved Maeve, he never even got the chance to touch her. Kitty may be the intangible girl but he's touched her in ways he never thought he'd do with a girl. He's lived with her for months, loved her even longer (though not by much in this world of quick decisions) and although he dreamed of marrying Maeve one day, Kitty is the one he's actually genuinely considered it with.
At the end of the day, she'll always win. She just needs to give him a little bit of time. ]
Kitty... [ He shifts a hand up into her hair, hugging her as close as he can despite potential tribble interference. ] I'm so sorry. You deserve better than this.