Hugs to you, red eye.
It is a scary situation.
I agree with all the PP and with you: I’d never kick a child out of my home, ever - bar abusive and dangerous behaviour, of course, though while she is jerking you around and being unfair for sure, you are a looong way off that particular threshold. It’s a moms job to sometimes to take the pressure from a child that can’t take the pressure any more, take the blame because the child can’t handle it. And yes, she is still a child, those frontal lobes of hers clearly not having kicked in yet.
So, among the good news, is that you and H probably agree on the not kicking her out bit, and also on not insisting on the going back to school bit. Let her take responsibility for that choice (it is only a choice as long as you offer her your house to go back to). And I do think it should be her choice, it is her opportunity to throw away. She’s earned it. You say it was essentially a full ride, you have just given her spending money and she has earned the college credits during that time, and they won’t go away. She doesn’t owe it to you to go back, and she needs to figure out whether she owes it to herself.
I also think it is reasonable that while you will always offer shelter and food, you will not offer spending money or the use of a car with the exception of approved reasons, eg going to community college, looking for a job etc. You will not always agree with your H on what is reasonable on that front, but that’s okay. You Sholdnt think about it in behavioural terms any more, not like you have to constantly hold the whip, be the bad guy in this relationship, just offer to this kid what feels right to you to offer and refuse what feels right to you to refuse. Keep her safe and healthy. Whatever else she decides to do, she needs to own it.
And now on to the unresolved stuff, talking about healthy. There IS something going on here that you and H haven’t quite sussed out yet. Special needs sibling, all the pressure to succeed (internal or external, doesn’t matter) on her, star student in high school, star student in music, always wanted to do music, suddenly refuses music, wants journalism school, suddenly refuses journalism school, moves from one potential major to another, can’t find anything she likes, wants to do medical imaging, wants to drop out of school. And a history of depression.
Depression is a perfidious illness in that it makes you feel that there is absolutely nothing you can do to make your life better, and that anything anyone wants of you is too hard and ultimately futile, anyway. Sometimes you just CANT take responsibility for anything. But there are a couple things that I firmly believe anyone with depression owes to their loved ones, which is if they offer to drag your ass to a doctor, you let your ass be dragged there, and if you are prescribed medication, you damn well take this medication every morning. The rest is up in the air.
I think in your case, that might be the one hill I’d be ready to die on - be dragged to a doctor, get the certificate for medical withdrawal and agree to go back on medication, if the doctor feels she should.
You might want to find a doctor who subscribes to the chronic disease model of depression - once you have had a major episode and a particular medication has worked for you, you don’t ever go off again, just keep on a low maintenance dose as long as you are feeling well, upping the dose if you feel another episode coming on. I believe there is solid research now that this approach leads to the best outcomes.
By the way, as long as you offer her a home, I think it is highly unlikely she’d take off to live with her boyfriend. Sounds like the boyfriend doesn’t have money and cars to throw around either, so don’t let that fear paralyse you.
All the best.
Oh, and I’d let the grades go. she hasn’t failed and has kept her scholarship so far. That should be enough for you. They are her grades, her responsibility. Focus on keeping the scholarship by getting that doctors note.
And even if she does lose the scholarship, so be it. She’s earned it, she gets to give it up. Her credits won’t go away, colleges won’t go away. If you can’t afford do to send her anywhere else, she will have to wait until she’s 24. Her choice. Not yours. Make her own it.