My roommate and i in severe coaddiction

Hi will keep things brief.

I R(20) moved in w my roommate A(19) last april. We became best friends in the dorms of a college in nyc. She is from russia and i am from a small us town. We are both navigating this kind of life for the first time.

We started doing drugs recreationally last year. Everything was sort of okay. When we moved in together we started enabling and did drugs/drink very frequently.

Im very concerned for my roommate because shes actually been clean for a while off drugs, 5 months. She just did lsd with me last night and is feeling very low.

I myself am addicted to drugs and do them frequently. Im very concerned for our safety but neither of us can go to rehab. Just i guess looking for tips on how now to enable and how to help her as shes coming down off this.