Dear Hottie by Mimi Barbour

During their last months of high school, unseen circumstances cause Eva and Jason to be together in a stalled elevator. Their mutual need for acceptance compels them to hook up in a way that neither of them ever forgets.
Eight years later, Eva still writes to him in her Diary every day as her way of clinging to their intimacy and giving her something to brighten her boring life.
Jason’s workaholic behavior keeps him so busy, there’s no time to regret his lonely existence. Only the hatred he nurses for the girl in his youth lingers from his past.
When they finally meet by chance, all those memories simmer between them… his animosity toward the girl who never acknowledged him after their passionate brief encounter.
And her unending grief that he broke his promise and never called.