These Broken Stars by Amie Kaufman & Meagan Spooner

Lilac LaRoux, daughter of the richest man in the universe, and Tarver Merendsen, a lowly soldier, would not ordinarily socialize. But, after their luxury spaceliner crashes on an unknown planet, Lilac and Tarver must work together to survive. Told in alternating narration, the readers are allowed to see how Lilac and Tarver must adapt to their situation. Both are complex yet relatable characters. These Broken Stars is a beautifully written sci-fi love story.