It’s just about being in his presence, not always saying something, find something you’d like to do together, and just enjoy that silence, be that mature part of yourself that is there for the relationship.
Non-judgement, there is no wrong or bad, they are all necessary parts, allowing these spaces to integrate and accepting that through non-judgement.
As an 8 absorbs the energy, you might be left deflated if you go into argument. So maybe he’s not getting it now, but you dropping seeds will help him see the light later on.