I think DD age 12 is wiser beyond her years and I deal in an industry that works with many personalities and executive levels. She makes me laugh so hard, is so witty and I actually value her opinions and sometimes her advice is on par with an adult/truly good. She is in a sense my best friend in that I like her. I love her as my daughter but I like her more than I like most people - it's true
So when I call her my best friend, some of it is that I really do think she is so awesome she is like a best friend. She's not perfect and I do have to be bad mom sometimes of course. But that notwithstanding, I have a great amount of respect for her as an individual. She has a sense of self greater than most adults I know. So I don't see her as "just a kid" in the sense of I respect she's a person who has her own thoughts, ideas, feelings. I used to think a 10 year old was just a kid who doesn't know shit. DD taught me that a 10 year old can be immature in a lot of ways and still worthy of being listened to as an individual. I don't think of her as a mature adult of course who knows the right answer to everything and definitely requires adult guidance. So my liking of her does not take a back seat to being mom and putting my foot down when I need to
But I think you can absolutely have a kid with a personality and maturity that perhaps fits so well with a parent that they are to an extent friends. And as the kid grows up, I definitely can see mom and daughters becoming friends. In fact, in a perfect world, I would hope for more. Why wouldn't you want to do things with your kid??? That doesn't mean you don't have limits or need to be with them 24/7. Just means a lot of like is there!