He got soft as soon as sex started

So I’m feeling really down right now.

Last night my fiancé and I were getting intimate. Our sex life it’s pretty spicy so I’m so taken back by how the night went. Basically we were fooling around and then it was time for me to get on top so not even one minute in I notice he’s soft I get off and ask him what’s wrong he just looks at me and doesn’t say anything. It’s never like that ever. He’s always so thrilled and fired up for this and the second I got on him he got soft. And his silence and then him looking away to the tv hurt even more i just put my patties on went to the restroom to console myself and then went to bed. A few hours later maybe 4 or so he face palms me to be playful and nudges me over to be playful but I’m too hurt to just be playful back so I continue to lay so that I don’t cry infront of him. I just don’t know what could have gone wrong. Like it’s it someone else, maybe I’m too sexual for him, he’s not attracted to me anymore. I don’t know I just feel so ....embarrassed and just so down