Paper Roses by Lily Morton

Jed Walker thinks he’s having a midlife crisis. The only trouble is that it feels too good to stop.

Widowed at a young age, he’s spent his life since then avoiding any relationships that might end up hurting him again. He has his successful wedding planning business, Confetti Hitched, and a series of uncomplicated hookups, and that’s all he needs in life
The one person disrupting this controlled stoicism is his younger assistant, Artie. He’s sweet and kind and has a funny way of calming Jed’s mind. So, when Artie comes to him with a problem, Jed moves heaven and earth to help, which is how he finds himself entering a fake marriage with the younger man and catching feelings. Too bad it’s all pretend. Or is it?