Yeah, most of mythology is a big black hole for Soldat, sadly. They really need reintroduced to it. Also, it takes them a minute to combine "feelings for" with god of love with jealous of the girl. Then they blink. "Oh. Right, okay." That makes sense. So does the fear, actually. "You know. People used to get arrested for that. Back in our time. Was just considered wrong by pretty much everybody. So I can see it being hard to say out loud. Even admit to himself, maybe."

There may be a bit of sympathetic understanding, there, to be honest, though Soldat is not entirely sure where it comes from. It's just a feeling unmoored from context. Weird. (Look original Bucky Barnes may or may not be gay, but he clearly loved Steve a whole hell of a lot.)