Have you ever been in a relationship when you have almost completely stopped feeling physically attracted to

Your partner? Do you think it's something to feel guilty about and how did you or would you handle that? Would it be best to end things, I think talking to them about it wouldn't be too wise in this case but idk. Let's suppose that they're really nice to you and you enjoy spending time with them and think they're nice, it's just that you don't find them romantically attractive anymore at all. Who should be at fault for that? If anyone