How to stay enrolled in Uni while receiving residential treatment

I didn’t really know where to go about this because I want to hold off from speaking to my Uni’s safeguarding as I’ve heard stories from friends that aren’t exactly that supportive so just wanted to see if anyone here is or has been in a similar situation !

I’m gonna try and keep this short as possible but im a drug addict whos received multiple different forms of treatment mostly for
mental health over the years, currently in therapy which fits with my uni timetable so thats all great. the problem is ive had probably the worst relapse of my life and despite succesfully quitting a few other drugs im addicted to, i’m now on c0ke 24/7 and i cant deal with this myself anymore, im at the point where i can admit to myself I need rehab
i had the oppurtunity to go a while back but i declined because i didnt want to miss out on uni, its my foundation year and ive just started, i study at ACM and getting into here was the best thing to happen to me considering i didnt finish secondary and dropped out of college twice
so yeah my place at this uni is everything to me, without it i dont know what i would do
but i know i need rehab, i’ve tried everything else and for the first time in all my years of using all types of drugs i am scared for myself
i never cared before because i didnt value my life but ive had so many overdoses and health problems im convinced if something happens again that’s it. i’m done.
so i was wondering if there’s a certain way to go about while still maintaining my place at uni ? would i have to defer for a year ? how would i bring it up to the uni safeguarding ? i know TWO people who nearly got kicked out for trying to commit $uicide bc my uni didnt wanna deal with it, saw them as “unfit” to study
anyway would appreciate some help
with this, sorry its so long idk where else to
go