I have female friend who I used to be intimate with. We were truly great friends but always very different people, so even when we were hanging out a lot and getting naked together, we were never a couple. Anyway, I distanced myself from her earlier this year after getting pretty frustrated with her lack of maturation and psychological development. She is 28 years old now and still acts like some stupid 19 year old who just wants to party and have fun and never apply herself or anything. She keeps getting animals as pets even though she can't properly care for the ones she already has. Still thinks it's funny to get shatfaced drunk and hangs out with people in their early 20s. Has had the same entry level job for 4 years even though the whole point of that job is that it's for people just starting out and is supposed to be stepping stone. etc etc etc.
I don't really know what to do about her. She has been an incredible friend to me, but even after trying to have difficult conversations with her about this a couple times, nothing seems to be changing at all, to the point it's starting to get kind of ridiculous in my opinion. It's one thing to act like a stupid 19 year old when you're 24, but if you're still acting that way at 30, it's pretty bad. The lightbulb doesn't seem to be coming on at all though.
Her dad abandoned their family when she was 13 and has had basically no contact with them since. I know that has messed her development up some. I tried to kind of fill that role for her for years (I'm 33 and have always been told I'm very mature for my age besides), but it didn't really seem to do any substantial good.
What should I do? Besides cut her out of my life? Is there anything that can be done with these types? People who remain psychological children well into adulthood? What even are you supposed to do with someone like this? Feeling kind of desperate as her latest clown incident has pushed me to being close to cutting all ties... Would appreciate some input.