This Matter Of Marriage by Debbie Macomber

If I want to get married and have a family (and I do), it's time for a plan!! 

–from Hallie McCarthy's diary  

The alarm on Hallie's biological clock is buzzing away. She's hitting the big three–0 and there's no prospect of marriage, no man in sight. But Hallie's an organized, goal–setting kind of person. She gives herself a year to meet Mr. Knight in Shining Armor. But all her dates are disasters. (There's the cheapskate and the sex fiend and…well, never mind.) 

Too bad she can't just fall for her good–looking neighbor, Steve Marris. He's definitely not her type. Anyway, Steve's busy trying to win back his ex–wife, Mary Lynn, who's busy getting married–but not to Steve. Life would be so much simpler if he could fall for someone else. Like…Hallie. 

They're friends, though–and sometimes friends become lovers. Sometimes friends become more….