I found my one not bad at all. Mainly, I think, because they retained their sense of humour, which we always shared.
I was aware at times I was being manipulated ( "mum, I'm in a lock in at pub. I can come his now alone and meet my deadline, or I can stay and come home with everyone else. What would you like me to do" sort of thing).
I just let it slide and thought that at least they were aware I'd be worried, while sneakily laughing at their ingenuity.
I found that the more I accepted that they were becoming their own person, and should be becoming their own person, the easier it was. That didn't mean I had to sit and watch them make mistakes. It meant, to me, that if I did see that, I'd treat them as a grown up and suggest that maybe there were other other ways to go about things that might reap better results.
now child is in their mid 50s and I live with them and their partner. And by and large, it's great, we all have a really good relationship.
I think it stems from our mutual acceptance of each other as adults back when they were a teenager.
It wasn't all plain sailing, but no part of child rearing is. Your child will be an individual, one you've watch and influenced as they've grown. So you'll know them and, hopefully, have a bond that you can strengthen during their teenage years.