The way you frame your question makes either decision a loss. Life is rarely that black and white. How about if instead you think about how you and your girlfriend could satisfy some of your sexual desires without pushing her beyond her comfort zone? Your fetish for satin is unusual but harmless. Your desire to go to clubs and expos, on the other hand, might jeopardize your relationship. Are you willing to meet her halfway? You want a little more exploration with sensory stimulation. She wants you to keep your sex life with her alone. Your girlfriend might be willing to experiment a bit more as long as you two explore together in the privacy of your home. Open and honest conversation between the two of you is what’s needed, not a judgment call from me. When a couple figures out how to work out genuine compromises about difficult issues in a loving way, they create the foundation for a lasting relationship.
I wish you well.