How can I become more attracted to my hubby?

Since late last year I've been losing attraction to him. He's not ugly, I don't know what it is. During intercourse it's been hard to look him in the eyes. I feel so terrible, and I don't know what's happening. He's a great man, respects me, understand me, has  never raised his voice towards me, listens to me,finds me beautiful although I bitch about how hideous I am. He's given me confidence. There's no such thing as perfect, but he's the closest thing to it and I love him. How can I become attracted to him again?