No sex drive after kids

Since having my daughter in 2011, I have zero sex drive. It's just something I never really think about until my husband initiates and it's just miserable for me. I'm either numb and feel no pleasure or I'm so tense that it hurts. My husband tries to be understanding but he doesn't really understand. He thinks it's him and I am not attracted to him. We rarely fight but when we do, it's about sex. I want to have a happy, healthy, sexual marriage like I see so many of my friends have. Has anyone experienced this?