Us at First (Carolina Rebels #2.5)
Lindsay Paige

When Sydney goes home, they keep in touch by texting and talking over of the phone, becoming closer and closer.
Sydney Jarvis can't believe a chance encounter at sixteen led her to a guy she talks to every single day. Ian's her best friend, who is somehow more than just a friend.
They're young, in love, and the one person they want most, they can't have. Not yet, at least.
This is a prequel novella for Ian Rhett in the Carolina Rebels series.