I'm 30 and was talking to my friend today about at what point we felt grown up was. For me, it was wanting to stay at home with my kids than going out and suddenly realising that all the people I used to party with when I was a teenager/in my early twenties, who we thought would be friends forever, are not preoccupied with their own children/partners and actively turn down nights to spend time with them.
It crazy that just 6-8 years ago nothing would keep them in and now we are all quite content at home. Does something happen in the brain to cause this? Or is it literally just growing up?
Another thing, years ago I'd have a bottle of wine and be ready to go out for the night. Now I have a bottle of wine and am ready for dinner/sleep.