dhopeless, I'm so sorry to hear about your situation
I think your depression is contributing hugely to how you see the situation.. I know how much it can colour things (or rob them of colour hah) and how it can make any option seem completely futile, and how you can feel too exhausted to even try anyway.. Are you having treatment for this? Meds/therapy? Are there any changes you could make to your life that might have an impact on your mood and state of mind? Is there any way you can get more help with this side of things? I know the other situation with your subs is very difficult, but I really don't think it is as completely hopeless as you feel it is right now, and I think your depression is the reason you can't conceive of there being a way to get through this.. which I totally understand
In the long term, I really think you need to stop injecting your meds.. but in the short term, to keep you safe and alive: maybe if you spoke to your friend and worked out a way for you to get micron filters and inject in a much safer way he would reconsider? Maybe show him your post here - I am
sure he would rather you lived, even if he doesn't like what you are doing, than you died.. 100% sure.
Or, alternatively, you could try taking the subs sublingually (or snorted) but explain to your sub dr that you feel the dose really isn't enough for your analgesia/cravings? Which is the truth, and is not an unreasonable thing to ask at all. You have a legitimate need for decent pain-control and also you need help avoiding the craving to inject (you don't have to be specific about this bit!!)
Or as another alternative, going on methadone for a bit could well work if you get the dose right and is definitely something you should consider - I'm really pleased to see you even vaguely considering an option other than death - it gives me a lot of hope!
I really think it's worth persuing these options.. and if the worst comes to the worst and you lose your prescription and can't get methadone or anything else - I know it will be hellish initially but it is definitely worth seeing if you can live with it and find some way to manage the pain and cravings - there are non-opioid options - nerve blocks/intra-vertebral injections, gabapentin/pregabalin and something like meditation (maybe coupled with therapy) can make pain a lot easier to cope with. I really understand that you feel that you can't live without the subs but death is so final - it's worth a go, surely? Hopefully it won't come to this though
I really do understand how completely hopeless you feel. I know it's hard to even keep fighting and trying alternatives when you feel like that and I know what it feels like to think that there is no way things will ever improve. But I think there are options, and even though it is so hard it is worth forcing yourself to try some of the things I mentioned above.. ask your friend for help and support, and lean on him when you feel like you can't go on. He sounds like a really good friend, even if he is putting you in a difficult position - it comes from a good place and I understand his motives completely!
Just to go back to your depression - your state of mind can make pain infinitely worse so I am positive that if you can tackle that your pain will be reduced, quite possibly to a level that can be managed with sublingual/snorted subs.
I have a lot of experience in depression and know how it can rob you of all hope that things will get better - but it
will get better. I know you won't believe me - I never did - but it is the truth and you do have options, and there is a reason to keep fighting. While you are alive there is always hope - when you are dead, there is no chance for things to improve..
Finally, in the short term, until things improve for you, if you can't bear to live for yourself - think of the people who love you (like your friend) and how devastated they would be for your death. Ideally you will want to live for you, and I believe that in time you will, but as a short term measure at least this can keep you safe