Where We Went Wrong by Kelsey Kingsley

Vinnie Marino has lived a hard life.
Between suffering from abandonment, drug addiction, and tragedy, he can’t imagine how things could get any worse. Until his father is diagnosed with a terminal disease, giving him only a few months to live.
Vinnie’s world is turned completely upside down, and it’s becoming harder to keep it together and stay sober.
His only saving grace is the unique and beautiful Andy Bennett. But Andy has a secret, one that could change everything.
Soon, Vinnie begins to wonder …
Could his only saving grace be his biggest downfall?