yep, he actually develops real, proper feelings for dane and because of dane’s no bullshit attitude (and the fact that he takes a lot longer to develop feelings for grayson than grayson took to develop feelings for him, like several months longer), dane is the only person who is actually successful in getting through to grayson that his actions have consequences and those consequences are things that grayson doesn’t like and has no control over because dane can’t be manipulated by grayson’s pheromones and also he is big and strong enough to fight grayson off when he really wants to (especially once grayson has developed feelings and doesn’t want to hurt dane because he knows dane WILL follow through on his word and leave and be impossible to find). Dane is the first person who grayson actually cares what their opinion of him is and grows a lot, dane is also able to help him grow by getting to know his childhood better and what things happened to him in his childhood to make him think certain ways (there are actually a few things that happened during his childhood that explain a few things he does, but only a very small few things he does), and dane is very good at explaining things to grayson in a way that he can actually understand and fully comprehend
yep, he actually develops real, proper feelings for dane and because of dane’s no bullshit attitude (and the fact that he takes a lot longer to develop feelings for grayson than grayson took to develop feelings for him, like several months longer), dane is the only person who is actually successful in getting through to grayson that his actions have consequences and those consequences are things that grayson doesn’t like and has no control over because dane can’t be manipulated by grayson’s pheromones and also he is big and strong enough to fight grayson off when he really wants to (especially once grayson has developed feelings and doesn’t want to hurt dane because he knows dane WILL follow through on his word and leave and be impossible to find). Dane is the first person who grayson actually cares what their opinion of him is and grows a lot, dane is also able to help him grow by getting to know his childhood better and what things happened to him in his childhood to make him think certain ways (there are actually a few things that happened during his childhood that explain a few things he does, but only a very small few things he does), and dane is very good at explaining things to grayson in a way that he can actually understand and fully comprehend

in the novel, like 2-3 months after this event happens, maybe a bit longer i can’t remember, but once grayson and dane have gotten closer and grayson has been over to dane’s house once or twice and met darling, grayson is working at the station and dane has a day off when the team gets called out for a fire and when they get there grayson realises that dane’s house is one of the houses that’s burning, none of the other guys on the crew have ever been to dane’s place or even know his address so they don’t know it’s dane’s house, only grayson does. And then he remembers that dane isn’t at home and darling is still inside all alone, and that darling is old, blind, and deaf, and how much dane loves darling more than anything else on the planet, and without thinking twice about it he immediately runs into dane’s house alone to rescue darling. He remembers this incident and thinks about where darling would hide when really scared and eventually he finds darling, does the same thing dane did in this chapter and puts his mask with oxygen over darling’s face, and makes it out of the house. By which time dane has returned home not knowing his place is on fire and tries to rush inside but is stopped by the rest of the crew because he’s not wearing any of his gear, but he still tries to go in because darling is in there, but they tell him that grayson has already done inside to rescue darling, and then when grayson comes out holding darling with his oxygen mask over darling’s face, dane rushes over to hold darling and thanks grayson profusely. It’s then, when grayson is sitting on the side of the pavement recovering, that he thinks about how crazy he was rushing into a burning and half collapsed building just to save a cat and what possibly possessed him to do that, and he kinda realises he did it because he knew how devastated dane would be if darling died and he didn’t want dane to go through that pain and grief, and he begins to realise his feelings towards dane.