Hello lzbth,
there is no real excuse in isolating yourself from your children but I think that you have some idea that it could be a lot down to the CDing which can make some feel very isolated themselves, it sounds like you want a last attempt to sort this out so I would go for it and directly talk about the CDing but realise that at first it may hit him back a bit knowing that you know and then after a while he will get use to you knowing and hopefully things will improve for you both .
