Basically anything by Marie Lu.
Partials - Dan Wells
Matched - Ally Condie
The 5th Wave - Rick Yancey
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Off the top of my head, I would say the Matched series, the 5th Wave series, and the Hunger Games series. I think the Uglies series has some romance in it as well, but its been years since Ive read it and I may be wrong.
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not exactly romance but 1Q84 comes to mind
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The Darkest Minds by Alexandra Bracken
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The Matched series!
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Under the Never Sky trilogy by Veronica Rossi is a pretty good one
Ended up ordering the series, thank you for the recommendation!!
Happy reading! I hope you enjoy them!!
Fifth Wave & Blood Red Road
You've probably read it but Hunger Games
Try The City Series by Sarah Lyons Fleming