The question I have is: do I just do nothing. Say nothing further until he brings it up. Ride it out a little longer. See if his actions continue to move forward and ignore his words.

Or do I initiate saying my boundaries. I can say I will not make a decision for him.

Next option is: you should leave. You don't want a M.

Me 41, H 47, M 15 yrs, S11, S13
BD 1: 11/4/14 we work on it; really I pretzel myself
BD 2: 3/31/15 H goes down to "dorm room"
8/15: H back to MBR
10/15: H back in dorm room
1/18: H files, now divorced