so the love/crush relationships among the warriros are a bit complicated but here is my interation (my headcanons)
Zeke doesn't like any of the warriros, they're all to young for him and he practically grew up as their older brother
Pieck used to date Yelena bu they broke up and are on no speaking terms, currently she liekd Porco but she has had a little crush on Zeke from the very beginning nad is kinda ashamed of it. She also later find Hange cute but didn't know them long enough to get any feelings
Porco likes Pieck, he used to have a crush on Annie when they were younger though.
Reiner likes Bertolt, when he realized that he tried to convince himself he's straight by developing that weird obsessive crush on Christa/Hisu
Bertolt likes Annie but he alsokinda had a little crush on Reiner which he never expressed though.
Annie likes Armin and had a crush on Mikasa during training but that eventually faded. She also had a little thing for Hitch
Colt had a little crush on Porco but more like a celebrity crush than a real crush even though they knew eachother.