Maybe he really does need to focus on himself now, and he clearly doesn't have the bandwidth to be a supportive partner.
Don't you deserve to be treated far better than this? I think you may need to look more deeply into how you are glossing over some pretty bad treatment--being in a relationship with an addict is a problem, because you are always compensating and walking on eggshells around their addiction.
So sorry for your pain, but this may be what we call "a strangely wrapped gift".