Like You Mean It by Zarah Bentley

Falling in love wasn’t part of the plan.
She needs a date for her brother’s destination wedding.
He could use a free holiday.
They’re roommates, but what’s a week of fake dating between friends?
Nila has always been a good daughter. She brought home the right grades, skipped the rebel phase most teenagers go through, and got into medicine just like her Indian parents wanted. With one exception: she refused to cut off her gay brother.
Whether she’ll be at his destination wedding in the Maldives is not even a question—of course she’ll go, even if it means facing the guy who broke her silly teenage heart. But asking her playboy roommate Justin to pose as her boyfriend so she can prove she’s one-hundred percent over Douchebag Extraordinaire? Isn’t exactly how she planned it.
It’s a win-win, though: Nila gets a boost of confidence, and Justin gets a holiday he could never afford on his student job. That he’s smokin’ hot is completely irrelevant to their arrangement: she made the mistake of falling for the wrong guy once and doesn’t care to repeat the experience.
Not even when things get a little too real for comfort.