Belonging (Where the Heart Lives #1)
Robin Lee Hatcher

Five years after the death of his wife, local merchant Colin Murphy cares about just one thing: raising his daughter, Charity. Colin wants to give her the educational advantages he never had. The new schoolmarm's inexperience doesn't sit well with him, and if this teacher up and marries like the last one did, Charity's heart will be broken once again.
A woman who hasn't known love. A man who lost the love he had.
In the midst of the wide, sage-covered plains, each is about to discover that life's bitterest circumstances truly can work together for good.