Informal:
* Nawawara ka. / Nawawara ako ha imo. (I miss you.)
* Ginmamalan ko ikaw. / Ginmamalan ko iimo. (I miss you a lot.)
* Ginhihingyap ko ikaw. (I long for you.)
* Naghihinumdom ako ha imo. (I remember you.)
Formal:
* Ginhihingyap ko an imo presensya. (I long for your presence.)
* Naghihinumdom ako ha imo pagkamaopay. (I remember your kindness.)
Romantic:
* Nahigugma ako ha imo. (I love you.)
The best way to say "miss you" depends on your relationship with the person you are talking to. If you are close to them, you can use the informal expressions. If you are speaking to someone older or someone you don't know well, you can use the formal expressions.
It's important to note that these are just a few examples, and there are many other ways to express "miss you" in Waray. The best way to learn is to practice speaking with native Waray speakers.