Only You by Denise Grover Swank
Retired Marine Kevin Vandemeer is back in his hometown, working construction and avoiding his mother's matchmaking attempts. While he figures out what to do next, he moves into a fixer-upper, planning to renovate and flip it. But when he meets his new next-door neighbor, he starts rethinking his bachelor ways.
Time and distance have done little to reduce Holly Greenwood's crush on Kevin Vandemeer, and that's unlikely to change now that he lives next door. She has too much going on to let herself be distracted by a man who doesn't want a relationship. But the more time they spend together, the more Holly's teenage crush is turning into grown-up feelings. Feelings he doesn't reciprocate. But what if he does?