Never Turned On

My husband and I have been together for nearly 10 years. When we first had sex (he took my virginity), I wanted sex all the time. Now, it's rare that I even get turned on. I love him and typically enjoy when we have sex, but why am I not getting turned on anymore? Does anyone have any suggestions to help me get in the mood? This is affecting our relationship. He thinks I'm not attracted to him.