Out of Nowhere by Phillips, Rebecca

At eleven years old, Riley Tate witnessed the sudden death of her father. Now, at sixteen, she still can’t bring herself to step on “the spot”–the section of kitchen floor on which her father landed after collapsing from a brain aneurysm. For Riley, a borderline hypochondriac with anxiety issues, moving on seems impossible, taking risks is out of the question, and even the simplest things feel loaded with danger.When she meets Cole Boyer in an ER waiting room, Riley realizes immediately that he’s far from the safe, predictable boy she usually goes for. A fearless daredevil with mysterious scars and a thirst for all things dangerous, Cole is like an accident waiting to happen. Still, despite their differences, they forge an unlikely friendship that eventually blossoms into something more. Dating someone who’s so casual about death has its challenges, but as Riley soon learns, not everyone can be–or needs to be–saved.