Should there be a romance in the story I'm writing?

I'm escritura a story and I don't know if I should add a little romance. I feel like it'd be a bit too predictable to do it between to two main characters (the male protagonist is Milo, and Lina isnt a main character but she's still really impotant) but the only other character I could see being with Milo isn't really into romantic relationships. Plus I plan to kill her off. That might work, (especially since I named her after an anime character who dies; the main character of the anime was in amor with her.)

I still feel like it's predictable though, but what do tu think. I feel like I'd end up killing off the other person.