Faking It for the Holidays by Bethany Monaco Smith

Sam and Kaila have been best friends their whole lives. Thirteen years ago, they made a pact never to date to protect their friendship. But when their well-meaning mothers keep setting them up on terrible blind dates, they decide to fake date through the holidays. With a set of rules in place, they won’t break the pact, right?
Sam
What the hell was I thinking? Fake dating? Fake dating the girl I’ve been madly in love with for most of my life? I’m an idiot. Of course, as always, I said yes to her. Like always, I’d do anything to make her happy. And, okay, maybe I thought If we pretended to be together, she’d realize how amazing we could be and forget about the pact. Instead, I’m more in love with her than ever and have no idea if she’ll ever allow herself to see me as more than her best friend.
Kaila
This is fine. It’s all fine. We’re just fake dating. We have our rules. We have the pact. We’re best friends: always and only best friends. But the longer we fake date, the harder it’s becoming to ignore the spark I feel between us. It’s always been there, but I’ve always ignored it. I’ve focused on our friendship because I can’t risk what Sam and I have. But his touch makes my heart race and his arms feel safer than ever before. It’s okay. I can handle this. Stick to the rules. Abide by the pact. This will all be fine, right? Fine, fine, fine.