All My Friends are Superheroes by Andrew Kaufman
All Tom's friends really are superheroes. Tom even married a superhero, the Perfectionist. But at their wedding the Perfectionist is hypnotized by her ex, Hypno, to believe that Tom is invisible. Nothing he does can make her see him. Six months later, the Perfectionist is sure that Tom has abandoned her, so she's moving to Vancouver. She'll use her superpowers to leave all the heartbreak behind. With no idea that Tom's beside her, she boards the plane. Tom has, until they touch down, to convince her he's there, or he loses her forever...This book is a wonderful, heartbreakingly funny tribute to love, sweet love.