Much scary stuff.
I'm in touch with two ex GF's, my first on just a holiday card basis. Neither of us would ever want anything more than wishing each other well. But that I honestly do wish her and her partner of over 25 years well.
L. , "my ex-one removed", long term relationship before the last one...we are now friends. That took a ton of hard work. It was a bad breakup but we've made our peace. Now when I see her maybe once a year at the parade or a ball game (hey, she may be my ex but season tickets to the Giants!!) we're honestly glad to see each other. She and her partner married in San Francisco on valentines day. I'm very happy for them.
Now my ex, the last one? Who's familiar with the phrase "if i never saw her again it would be too soon" I can't imagine being friends or contacting her in any way.
But no stalkers ;-)