The theory is: Some one new to recovery needs to focus on their recovery.
The suggestion is "No major changes in the first year"; which is hard to follow because of the nature of recovery- ( all about change)
" No new intimate relationships" would be closer to the truth.
('Pink clouds' sometimes make this hard.)
If you are clean& sober, it will be easier for him to work his program.
If he gets a sponsor, goes to meetings and works his program-
why would there be a need to split up?' One day at a time' means just that.
If you can find a way to go to meetings- Alanon, Acoa, Coda- so much the
better! Blessings, Nia