I have to agree with Kevin here. You shouldn't feel guilty about how you are feeling. It's what you choose to do with your feelings. You did talk about it with your husband and he basically put the kabosh on it. At least you were honest and didn't stray from the relationship. We are all human. You can't control what you feel sometimes. There's different types of feelings too. You can have the sexual attraction from the beginning but find that the person just not satisfy you intellectually or emotionally or you can start out not feeling a sexual attraction but after spending time with the person it can turn into that. This forum has been great for me as I hope it will be for you. We can all learn from each other and as I like to say "hope and cope"
Good luck and look forward to further posts and updates!