Goodbye Again by Caitlin Moss

Fated to meet.Destined to love.Bound to fall apart.
In Julia Waters's world, everything is easily explained. Simple, uncomplicated, logical. Until she meets JP Chapman on a cross-country flight, the handsome kindergarten teacher charms her with his wit, humor, and irresistible smile. While spending a magical night wandering the streets of Seattle, the two stumble upon a fortune teller who predicts their futures will forever be entwined.
But sometimes the road to love isn't a straight line. Over the span of five years, careers, different cities, and missed chances stand in the way of them being together. It isn't until she starts listening to the advice of her late grandmother, who visits her dreams since that first night in Seattle, does Julia realize not everything about love is straightforward.
If she hopes to discover why an invisible string continues to pull her back to him, she must trust her grandmother's advice and, ultimately, herself.