Chasing The Stars by Malorie Blackman

Olivia and her twin brother Aidan are heading alone back to Earth following the virus that wiped out the rest of their crew, and their family, in its entirety.

Nathan is part of a community heading in the opposite direction. But on their journey, Nathan’s ship is attacked and most of the community killed. Only a few survive.

Their lives unexpectedly collided, Nathan and Olivia are instantly attracted to each other, deeply, head-over-heels – like nothing they have ever experienced. But not everyone is pleased.

Surrounded by rumours, deception, even murder, is it possible to live out a happy ever after . . . ?