I have never wanted to go out with my 'mates', not even when I was younger. Prefer mixed company and we just always socialised together. I have never known him go out for a drink with his mates either. We don't live in each other's pockets, far from it, but an evening out without him wouldn't even occur to me. I do go and stay with friends overseas and in this country without him and spent a month in Australia. I also meet up with friends during the day time.
We both pursue our own interests as well, but nights out just wouldn't appeal to me without him around. And I HATE hen parties and hen nights!!