This is just my opinion, but due to the current timeline of social political unrest, (and maybe it's easy for me to say as I'm a single Black gay feminine man, and been this way all my life, even in my youth, and I'm in my 30s now.) I can understand somewhat if this were twenty or so years ago. I would agree with you, that as long as you were faithful to your wife, and weren't sleeping around with other men, you can keep your curiosity to yourself.
However, again as I said, it's 2024, a few more days we'll be into 2025, so we are in a different time now. Belgium is an LGBTQ safe space. So I think you need to come out and be honest. If she leaves you, then she didn't really love you. I'm so fucking sorry.
I also felt your comments about staying closeted were kinda depressing and sad, and you hold incorrect generalizations. Yes I'm feminine/flamboyant/fruity, but I can count on my left hand, and have close to five fingers still up, on the number of guys I've had sex with. Some gay men are promiscuous, but I am not. I also don't really care about being trendy with my appearance. If someone isn't keen on the way I look, then I couldn't care less. Yes there are some gay men who are vapid and are into appearance, but not all of them are. I feel you could adjust all those poorly thoughts you have of the LGBTQ community, into something good, and possibly join LGBTQ acceptance groups/political groups.
Or you can just keep it a deep dark secret smh, but I just feel in this day and age, and where you are located, that seems very depressing. But that's just me.
But it is your choice. I'm just some ignorant absent minded fool on a sex discussion message board, so although I do hope you take a some of my sentiment into consideration, whatever I say is not bond or law, but just saying.
Hoping the best for you.