Welcome, Daisy.
I've been on both sides of relationships involving drug use-- involved with an addict and later as an addict myself. I was also raised Quaker... not exactly the same as the Unitarians but of a similar bent, generally.
You are welcome to post here in SC, as far as I'm concerned. F&F feedback comes from what I have lived: it's awfully hard not to be dragged down by an addict. I ended up with my very own alcohol and meth addictions because I couldn't let go of an addict boyfriend; I got pulled into this world along with him. It doesn't have to be that way, but I think it will be a bumpy ride for you. Heck, it already is!
Not sure I can offer much in the way of advice but I'm happy to offer support wherever I can. Keep on posting here, if you find it helpful.