Is he normally a texter? Maybe he's like you and has a distaste for in depth conversation that isn't face to face?
Do you think he'll continue on the good path if you stay? Do you think being apart would grow his appreciation for what alcohol and his interactions with it has taken from his life?
If you want things to work out in the long run, it may be proactive to keep your distance. Set a time frame and if his path is consistent for that amount of time, you can revisit living together. Based on your post of his thoughts, he doesn't sound sure at all. Protect yourself first, if love is there it won't go away because you move across town
