Is it too late to DB?

[MrBond]

That's his way of grieving. He wants to lash out and express himself. Unfortunately you're an easy target to blame. When he gets like that, tell him that you feel sorry for how he feels and that you loved his dad too. But that he has NO right to take anything out on you and that if he will no longer beat you up about it. Sometimes the direct route is the best route.