Step Right Up by L.A. Witt

Jason Richards is ridiculously in love with his friend and coworker, Ahmed Kazimi. Unfortunately, Ahmed is a package deal—he has a boyfriend who, as far as Jason is concerned, needs to be launched into the sun.
Then a mysterious carnival rolls into town, and Jason and Ahmed can’t resist going. Not even if Ahmed’s boyfriend can be depended on to make everybody miserable.
When Ahmed wins a strange prize from an even stranger carnival game, weird things start happening. First, a mishap with a friend’s newly purchased love potion. Then a cascade of steadily worsening bad luck starts to rain down on every corner of Ahmed’s life. Though he doesn’t believe in the paranormal, he can’t help but wonder if his prize is cursed. Just to be safe, he throws it away.