Bedroom help pls

I’ve always considered myself a hyper sexual person. I like to dirty talk, make out and all that fun stuff. But I’ve realized the other day that when it actually comes to sex I’m very disinterested. I’m almost disgusted by what I’m doing and I feel really guarded. I get super quiet and uncomfortable. I’m with the person I love but I just can’t feel good about it. It’s awkward for me and I don’t know why. He always takes the lead because of how unsure of myself I am. I don’t know why I feel like this or what to do to make it better.