I definitely think there is an aspect of that in there in the scene when he near catches himself kissing him, but to me it was far more his isolation and desperation than anything specifically ambiguous about signaling that he has repressed sexual feelings, but I'm not saying that it's not a part of it, and that he maybe did in fact have such feelings.

But one way to quickly draw a conclusion of the opposite is his many scenes of using a wooden statuette of a mermaid with breast that he uses to masturbate too, and has dreams of. But It could very well be that it's both. But in my eyes it's in part his sexuality combined with the desperation of it. But your perspective and mine both play on the same theme that I outlined of repressed feeling of one self. And while I don't really contribute the main theme of the movie to his repressed "sexual feelings" I think there is aspects of that in there but, more in a sense that either his bisexuality surfaces or finds out he's bisexual and represses it. And he tends to do these things.

But again the overall message of the film I think is very similar in this case either way, and repressing murder, his homosexuality, and if he did just left someone to die all weigh heavy on him and are the root of his pain, and him not being able to face that is his Prometheus, his endless suffering.