I feel like I am losing my friend to drugs

Hey everyone, hope you are all great.

So basically what the tittle says, I have a friend who we are gonna call Susan, susan studies a course of ilumination and photoshop and since she started that course a year ago she has been surrounded by bad companies that she insists are not bad but these companies who are one girl and and one boy have introduce her into the weed, at first last year it was a funny thing, she showed me and we used to smoke one time a week.

It was just two 20 year old smoking weed sometimes, and that was all.

But since some months ago she has changed that and made it into a habit, she is constantly buying weed and yesterday I spent the day with her and from 13:30 pm to 18:30 pm she smoked more than 10 joints, and she is constantly coughing and a really deep coughing.

But what it worries me the most is that she is not only with weed since a month ago or two she has started trying clore the real name is cloretilo chemirosa, which is an anesthetic. She sprays it in a t-shirt and suck it or breath it really deep she then told me that she feels her heart beating really really fast and she can hear her heartbeat really clear but not the reat of rhe world.

One of her friend of her class that take it with them even faint everytime she take this.

I am really worried about my friend because I really do not want to lose her and the rest of the group we have been talking this and we are first of all worried, second of it surprised by her lung capacity.

What bothers me the most is that she critices me and some of my friend for not wanting to smoke anymore or for being some kind of nerd, she critices my career saying that software engineering is a red flag for her, another friends are studying ocupational therapy ofc she does critices them saying things like: they do not do anything at all at college, I do not understand how they are tired they do nothing at all.

But she glorifies what she studies and what scares me the most is that she glorifies taking drugs she says she is a really cool girl for it and she does really believe it.

I do not want to lose her but It is impossible to talk with her anytime I say something like: have you ever think about quit smoking? she does not even consider it. And now she does she clore as another pass-time.

So any advice and recommendation is more than welcome, thank you all in advance