This is really difficult op. I think I would have intervened before she decided to study on line and live at home but at least she is studying and working pt so that’s good.
Socially though she is isolated, she is smoking weed, her sleep schedule is out of whack, and she is not pulling her weight at home.
I think there is a point at which supporting becomes enabling and I think you are within your rights to say that you would like a meeting with her to discuss some important matters. Take her out to lunch in a neutral place and really listen to her and ask her how the arrangement is going from her pov and how she feels in herself?
And then tell her how it is from your perspective but I would approach it from the pov of being concerned about her mh, Her behaviour is of course disrespectful to you crashing around at 3 am and not pulling her weight but you won’t get far if she gets very defensive.
Tell her that if she was away at university, you wouldn’t care if she was up all night and not doing the housework, not seeing friends. and you wouldn’t know if she was smoking weed or not, but she chose to live at home and you live there too and you find these things worrying and upsetting because you love her!
What year of university is she in op? I think you are within your rights to say that if things don’t improve, you will be reassessing the arrangement after the end of this academic year, because you are worried that an extended adolescence is not doing her any favours.
Also you need to set some expectations around the summer holidays and how she is going to use the time?
Maybe decide on a compromise about her moving out within an agreed time? My DDs became a lot more appreciative of home comforts once they moved away and had to shop, cook and clean for themselves!
Is there any way you could afford to support her financially in shared student accommodation op? Maybe a deposit and a portion of the rent per month? Maybe if your bf moved in and shared some of your living expenses?
Or could you move in with your bf and rent out your house and your dd would have her corners knocked off by having to share your current home with the other tenants?
The only thing that makes me uneasy with all of this op is whether she has underlying mh issues? Why is she so socially isolated at her age? Has this been a pattern since childhood? Has she always found friendships difficult? People often smoke weed to calm anxiety or avoid confronting difficult issues. Why did she drop all of her friends? She also seems quite dependent on you for her age? Do you think she has a mh issue, an SEN or is she ND perhaps?
Is her weed smoking at the point where it is causing her to lose friends and drop her responsibilities? It is a bit worrying if she is smoking alone at home?
i would definitely make it a condition of her living at home that you see her exam results at the end of this academic year. If it comes to it, I think you are within your rights to try and find out how much she is smoking, whether or not it is impacting negatively on her life and if it is, say no weed in your house and if she wants to smoke she either stops smoking, seeks help for her addiction, or moves out.
Edited to say that so many dc of this age are struggling, and I think it’s because they had such a shit time during the pandemic, which really ruined the second pivotal A level year and the first year or so of university. They missed out on useful life lessons! Your dd is certainly not alone in that op! It’s been tough for them and yet this is not acknowledged and they have just been expected to carry on as if nothing hapoened!