Coming Home by Rachel Andrews

The past and present are about to collide, but not all collisions are fatal.
Charlotte has very low expectations for the beginning of her junior year of high school, as most of her friends stopped talking to her last year due to her brother’s erratic, dangerous behavior at school. Now Charlotte is a shell of her former self, trying to not feel any emotions as she watches her family fall into disarray.
Before the school year can even get started, a figure from her past shows up. Will. Her brother’s former best friend. He moved two years ago without so much as saying goodbye to Charlotte or her brother, but that doesn’t stop the immediate attraction that Charlotte feels for him. The same attraction that was there even when they were kids.
Charlotte desperately wants to hide her family’s instability from Will, who seems the same as Charlotte remembers him. Handsome, smart, funny, popular. Will starts to break down the walls that Charlotte has built up around herself, but as he does so, Charlotte begins to realize that even Will has secrets he wants to keep.