I would confront him WITH his family there, He needs to SEE that YOU are not the ONLY one hurt here.
That is a big part of the problem. He seems to think that his choices only hurt YOU.
Until his family confronts him as a group he is goign to continue singling YOU out as the recipient of the damage and to his mind he doens't care enough if its just you... his addiction has the better of him right now. He may be remorseful, but he needs more incentive to fight an addiction than just you asking not to do this.
