MT-Hope is right. Maybe suggest that out of respect for M he should behave more appropriately in public. I don't know how to put it, you will figure that out.
Listen, you can feel bad. That is ok. It is normal and natural. But once again, you are focusing on his behavior. You know you can't control it but you have to stop letting it control you. You have to figure out a way to focus on MT. It will help you to see the difference between fantasy and reality after a while. It will allow you to be more objective.
I'm spinning right now and having a really hard time putting words together to say what I really want to so I'm going shopping and will check in on you later when I can focus.
If you focus on the past, you ruin the future. You can only live for today.