Risking It by Madeleine Labitan

He’s the one guy she’s always wanted…
Allison Turner has always been known as a goody-two-shoes. One who always plays safe and avoids risks like the plague.
Well, it’s time for a change—and agreeing to be Duane Hollis’s fake girlfriend to make his ex jealous seems like a good start as any. There’s just one problem: he’s her brother’s best friend and the boy she’s secretly in love with. Complicated doesn’t even begin to describe the situation.
Allison knows it’s totally insane and completely stupid to help Duane out, especially when her heart is at stake. But maybe, just maybe, it’s exactly what she needs to turn things around…and finally get the guy.