The Two Lives of Lydia Bird by Josie Silver

Lydia is young and engaged to the love of her life but then a horrible accident robs her of Freddie forever. She is left with a broken-heart and Freddie's best friend Jonah, who is just as devastated.
The only way to get through her grief is to sleep and dream of what her life would have been like if Freddie were still alive. As happy as they are in this alternate universe, Lydia knows she can't sleep her life away forever. This is a story of loss, finding those people who will throw you a lifeline and knowing when to catch it. Warm-hearted and as cathartic as a binge-watch of LOVE ACTUALLY along with a good cry, this will appeal to all you rom-com lovers and readers who never lose hope for a happy ending.