It does sound like he is gearing up to leave. He wants to explain in his own head why he would have reason to leave. If you yell all the time or are potentially violent then it relieves him of responsibility for himself. He's defiantely projecting. Just keep leading your life as best you can and as GEL suggested - don't talk to him when he is being inappropriate. The interesting part is that since your stich has kinda come to a head he is suddenly spending a lot more time in the "mix" instead of holed up in his own space. He's definately feeling the dynamic changing.
