This is me. I guess I am not normal too. We have been together 9 years, and a son aged 6. After about 2 years I started to lose interest in sex and it hasn't returned.
I tried pretending, me taking the initiative, telling him what I like, doing new things, having 'a date' together, just doing it for him, imagining he is someone else. No strategy has helped. I actually do feel revulsion now during and after.
I have always enjoyed sex in the past, and he is actually really good. Somehow, something in me doesn't want to give it to him.
He is a good man, he loves me. However, I am often frustrated by things he does. His (in my view egocentric) way of behaving, or him being disrespectful. We have often talked about this, and that does help.
I feel really unreasonable for always being angry with him. I figured it was because I had lost 'me' in the relationship, as really me life 'before children' is entirely gone. This time, to save our relationship, he gave me lots of space, so I did go on a break with a friend, I organised the summer holidays the way I liked, I had some good times and I did find a bit of my old self back and it did help.
But...still no sex. I asked him if he would object if I find help, and he didn't..sort of. He doesn't like it, but I think it's the only way I can untangle my feelings.