My Secret Kink and My Partner's Silence

I've always felt like there's this deep well inside me that only gets touched when I explore my kinks. It started a few years back, during one of those late-night conversations with strangers online where you can let your fantasies out to the world without judgment. I discovered a kink for humiliation games, the kind that makes your cheeks burn and your heart race in ways no other experience ever has. I've been married to Sarah for five years now. We're good, solid together, she's supportive, we have fun, but there's this space where my needs aren't met because I haven't shared with her the things that truly turn me on and off the charts. A few months ago, I tried to mention it gently in passing, thinking maybe we could explore something new, but she changed the subject quickly. It breaks my heart a little every day when I think about all the moments of pleasure I could be experiencing if only there was some way to communicate this side of me without fear. What do you do when your partner just isn't on board with your secret turn-ons? Am I supposed to keep it bottled up forever, or is there a path forward where we can grow together even in areas like this?