First off, welcome to SR.
I had once replied to a post asking our opinion of what we thought the worst drug was. I said whatever drug we are addicted to. In the same vein, I guess the worse withdrawals are those we have from the drug we are most addicted to.
I was a meth addict. Yes the physical withdrawals are minimal. But the mental obsession to use is excruciating.
You asked for support. Perhaps you would benefit from Nar-Anon. Dealing with addiction is one thing. Dealing with an addict, a different beast.
We also have a forum for Friends and Family of Substance Abusers. They can provide a lot of support, as they are in your shoes.