Glad you laid it all out for your married friend. I wouldn't be surprised if it went in one ear and out the other and he may very well try to test your boundary again in the future.

Glad the AC is being installed. Yes, it's expensive, but well worth it. One more thing to check off your list.

Sit quietly, the answers will reveal themselves when you least expect them to.
The past is gone, the present is a gift and you need to focus on today, allow the future to reveal itself when it is ready.