One of the challenges of codependency for me was the loneliness that came from giving and never getting anything back.
After a while I discovered that the other person was not "withholding" love, affection, etc. But that they simply did not have it to give - to themselves much less to me.
So I found ways to get the love and care I needed to sustain me.
It's sort of like that song "looking for love in all the wrong places". There is love and companionship out there - we just have to look for where it is and not where it isn't.
that is not to say that the addict won't one day be able to love, but it takes time and a lot of work for that to happen.
May you find what you need on the way to what you want.