Husband help

I really need some help. My husband and I have been together for 7 years, married for 4 of those years. I feel like I’m no longer attracted to my husband. I literally never want to have sex with him, and I NEVER thought that could be a possibility. I’ve tried doing different things to spice things up and expressing things that would turn me on more, but it really just makes me cringe a little when he does them. I love him so much and he treats me so well! We always have fun together! Our relationship is great....except for the sex. What do I do? I feel like sex is ruining our relationship. I’m in desperate need of some help!