Shame

For the last few years, my sex drive has been non-existent. I like sex, but when I think about having sex, or even when my husband is trying to turn me on, I can't do it. I just feel so gross for liking sex and just ashamed! I don't know how to describe it exactly, but I feel WRONG for liking sex. I've got kids and just feel like now that I'm someone's mom I shouldn't be boning. Maybe this doesn't make any sense, I guess I'm just looking for advice. Has anyone struggled with the same feelings? How did you conquer them? I love my husband and find him attractive, but just can't get past the psychological "shame" of wanting or liking sex. I envy others who get horny or have hot sex lives :(