Snowbound by Alyssa B. Cole

Despite his wealth and looks, Caleb’s life feels like it’s taken a nosedive ever since his ex cheated on him. The betrayal stings, even though she wasn’t his soulmate, given the lack of a Mark on her arm. A looming Christmas blizzard is just one more thing to deal with – until he meets Brie, a cute librarian-to-be who happens to be his neighbor. And his soulmate.
Caleb might fall just as fast as the snow outside. But will she?