Responses

nah he's just being gay towards estella and I don't think he knows.. I mean the author could made a plot, getting busted by antagonist like "oh no the prince actually married a guy? imma just tell the whole world how gay he is... but surprise surprise estella is actually a real girl! I'm fucked" and there's the contract of pardon just in case she accidentally reveal her real gender. ٩(๑❛ᴗ❛๑)۶
From the way the prince acts, it's sure he knows she's a girl already. I don't know why he chose her for real, nor why he acts so infatuated towards her, nor why he doesn't tell her. It's interesting but a bit tiresome to have a plot that resolves a lot around misunderstandings based on hidden information.