Heatwave to the Heart by Meagan Schwarz

Decker Ford is the last single standing. And while he can see how happy his friends are with their significant others, he's just not sure he's ready for a committed relationship. A relationship would mean leaving the fun, carefree party life behind... and also the possibility of having to come clean about a past he's less than proud of. But sometimes, life has other plans. And who would have guessed those plans would start with a girl literally running away from him the first time he talked to her.

Ryleigh Kennedy is a hot mess. A tired, anxious, hot mess express. She's doing everything she can to keep her head down and blend in so she can stay hidden. Life has never been kind, so there's no reason to think it would start now. But when a very unexpected man keeps showing up, he becomes really hard to ignore. So does his kindness, his genuine interest, and most importantly... the safety she feel when she's with him. But does letting her guard down mean giving up her security? Or could it mean finally finding happiness?