Nobody hates that they have favorites more than LOKI.
He likes Amora. He like Lorelei. He likes Theo. He likes Mobius. He likes the horse…But he LOVES Sigyn.
He has admitted it once in the comics and likely will never again and i think that’s what makes it so juicy. Whether they will get together again or not. Doesn’t matter. He folds for her in ways he won’t for any other. (Thor issue 310-312). It’s why I don’t care that he is given other love interests and flings. Let him have his chaos, for he knows Sigyn is his anchor and he hates it. How she toys with his nature, domesticates it, by just being…her. He hates how he doesn’t stand a chance.
Maybe it’s because he doesn’t recognize himself with her, or maybe he sees what he could be, what he could have always been - loved.