D is for Doctor by Brenna Jacobs

The last thing she expected was to fall for the shy new doctor next door…
ER doctor David Daniels thinks his neighbor, Avery, is way out of his league. But chemistry is chemistry, and he’s pretty sure they have some. If only she wasn’t dating someone else . . .
Avery Middleton thinks her neighbor is cute in a dorky brother kind of way. But the more she gets to know him, he seems a little less like a brother and a lot more like the sexy doctor next door. If not for her recently rekindled relationship with a boyfriend from the past, she might give the doctor a second look.
When David learns something incriminating about Avery’s boyfriend, he’s forced to decide: play it safe or risk his friendship with Avery and possibly his career to tell her the truth.
Will the sparks between David and Avery be enough to turn their friendship into more?