How do you do this? How do make an unexpected encounter with your EX easy and bright?
You fill your mind with happy conversation, with retelling something in the most positive light, and you be happy while you’re doing it.
You don’t think about everything that *&^&* did to you. You don’t think about how much you would like to see that ^%^&* drawn and quartered. You think about your topic.
Imagine every scenario, from seeing EX at the supermarket, to a wedding, to a phone call, and rehearse how you will sound. What you will say.
In this way, when it happens in Real Life, you’ve already memorised your lines.