[Toby knows that sort of pain without the benefit of marriage. It's part of what drew him to Dorian in the first place. Both of them know what it's like to live on while people who are important to them age and wither, fall ill and die. He wanted more than that, and upon hearing of Dorian Gray, Toby had to know if he was the real deal, if he was immortal. And after that, he knew he wanted Dorian to want him the way he wanted the immortal. Perhaps even more than that, even.]

You aren't wrong. But thankfully it's so much more than that for the both of us.