I'm not sexually attracted to my husband. What can I do?

I do anything to avoid getting intimate with my husband of 8 years. Including, but not limited to; starting arguments, getting mad over nothing, using his disrespect as a scapegoat and overall I avoid being physically affectionate. I think I fell in love with someone else during our separation and I don't know why I agreed to get back together. He is controlling and manipulative, his words are like knives pounding into my heart, he's disrespectful towards and up until now he has let everyone else disrespect me. He is childish and just plain mean. That being said, he is also a hard worker, he provides and never fails to pay a bill or provide food for our household and especially, he gives my son anything he asks for. Sometimes it feels like there's more than one person living inside him and it is exhausting. Help.