Sweet sorrow / David Nicholls.

Enhanced descriptions from Syndetics:

"A tale of first love that hits all the right notes . . . [it] just might be the sweetest book to brighten your late summer." --The Washington Post

"Dazzles with wit."--People

From the bestselling author of One Day comes a bittersweet and brilliantly funny coming-of-age tale about the heart-stopping thrill of first love--and how one summer can forever change a life.

Now: On the verge of marriage and a fresh start, thirty-eight year old Charlie Lewis finds that he can't stop thinking about the past, and the events of one particular summer.

Then: Sixteen-year-old Charlie Lewis is the kind of boy you don't remember in the school photograph. He's failing his classes. At home he looks after his depressed father--when surely it should be the other way round--and if he thinks about the future at all, it is with a kind of dread.

But when Fran Fisher bursts into his life and despite himself, Charlie begins to hope.

In order to spend time with Fran, Charlie must take on a challenge that could lose him the respect of his friends and require him to become a different person. He must join the Company. And if the Company sounds like a cult, the truth is even more appalling: The price of hope, it seems, is Shakespeare, Romeo and Juliet learned and performed in a theater troupe over the course of a summer.

Now: Charlie can't go the altar without coming to terms with his relationship with Fran, his friends, and his former self. Poignant, funny, enchanting, devastating, Sweet Sorrow is a tragicomedy about the rocky path to adulthood and the confusion of family life, a celebration of the reviving power of friendship and that brief, searing explosion of first love that can only be looked at directly after it has burned out.