Puppy is sooooo right in the wait a day and what your response should be for now. As well as him saying it isn't the time to make any decisions. Too many of us make a decision in the heat of the moment that may not be the right one at the time.
This could be MLC, depression, or simply A. Or not, or all three. Just don't know. Either way there is confusion involved. That is his. You need to deal with YOUR feelings right now and not worry about his. Take some time, take some meds, continue the counseling it may help with the anger, and just take your time.
Going dark right now is probably the best thing you could do for you. You need time to work through your shock and anger and you might say something you really regret if you try to talk to him right now.
If you focus on the past, you ruin the future. You can only live for today.
