Some things never change. I remember going through almost exactly this line of reasoning not once but twice, for different girls, about 40 years ago. In neither case did things work out the way I wanted. In one, things worked out very much the way she wanted, which was and is great. In the other ... who knows. But Google is my friend.
Webmentions allow conversations across the web, based on a web standard. They are a powerful building block for the decentralized social web.