It Comes Back To You by Amelia C Rose:
 
Kat thought she was living the life she wanted. She has a successful career, great friends, and loves her family fiercely.

But when her brother dies in a tragic accident, Kat must embrace her brother’s best friend—the man who broke her heart and she’s been avoiding for several years.

Kat and Sam realize they can only overcome their grief if they do it together. As they navigate their shared loss, they must face fragments of their past they thought long buried and rethink the life they thought they wanted.

As Kat picks up the pieces of her broken heart, she finds herself at a crossroads. Either she stays frozen in place, always dreaming of what could be. Or she takes a leap and hopes Sam is there to catch her… this time.

In the end, they’ll either find their way back to each other, or say goodbye forever.