These Broken Stars by Amie Kaufman

Lilac and Tarver are passengers on a luxurious space ship called the Icarus.  Lilac, the daughter of the richest man in the  universe, and Tarver, a boy from a humble background who became famous for heroic deeds he performed as a soldier, meet one night in a salon within the ship.  They are instantly attracted to one another, but Lilac must reject Tarver for fear of what may happen to him at the hands of her father.

Then, without warning, the ship drops out of hyperspace and it hits the fan.  Lilac and Tarver end up in the same escape pod that crash lands on a seemly uninhabited planet.  They are the only survivors of the crash of the Icarus, and they must learn to survive on the planet while they make their way to the site where the ship itself crashed in hopes of being rescued.

Disclosure, I have never sat through an entire viewing of the movie Titanic, and I've never seen the original movie of The Blue Lagoon, but this book reads like the YA novel love child of these two movies that has Twilight as its godparent.  The book is told in alternating perspectives from Lilac and Tarver after they have obviously been rescued.  They spend the first half of their time on the planet trying to be rescued, then the other half of their time there being all schmoopy and puppy-dog in love with each other.  This book is really unrealistic in the fact that Lilac takes only days to acclimate to roughing it (Survivor level roughing it) on the planet, and within a couple weeks is willing to give up her old life and stay in this remote place just so she can be with Tarver.

I almost gave up on this book a few times, but the mystery surrounding the planet made me keep reading it.  I'd kind of like to see what happens next, but I might be more likely to ask a friend who reads the next book to fill me instead of reading the whole book myself.