Promises at Pyramid Rock by Jess Mastorakos

Will this Marine risk everything for a chance to leave the friend zone?

Ethan “Mac” McCarthy is secretly in love with his best friend, Ana. It all started on the playground when she kicked him down the slide because he was too scared to take the plunge. But they haven’t lived in the same town since they were kids, so it’s been easy to keep their relationship platonic.
The only person Ana Vincent can count on is her long-distance best friend, Mac. He knows her better than anyone. When he suggests she finally get her own place instead of hunting for yet another roommate, that’s exactly what she does. And boy is he in for a surprise when he finds out where she’s bought a house.
Mac has always told himself their physical distance was the only thing keeping him from admitting his true feelings. He doesn’t think she feels the same way. How will he keep his secret with her right under his nose again?