Lou, There is no right or wrong way to deal w/a MLCer, but I have to commend you on staying cool, calm and collected. I'm sure it was a shock to have him call, tell you what was on his mind, and yes, a roundabout apology, and the length of the call.
It's a new beginning and hopefully the two of you can forge some kind of new friendship and go from there. Yes, the ow was a crazy one and it's not over yet. He still have a few months left on the lease before he can get away from her...but don't be surprised if he opts to stay w/her or she stalks him later. If she's that crazy, she'll do anything to keep him in line and w/her.
Keep your expectations at zero and continue has you have been and I think a friendship can be forged. You'll soon be writing the next chapter of your Life's Book before you know it.
I pray that he's on the right track now and will finally figure things out for himself.
Continue moving forward. You are doing great!
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.