I think this might want a clean sheet design. At least as I understand it, there are issues with privacy in the fediverse/activitypub vis-a-vis non-public messages. I think it's also an area where, in order to go the most good, you'd want simple signups and easy engagement (to say nothing of being able to trust that your info has been deleted when you delete it).
Clearly, I'm here and I value the philosophical underpinnings of the fediverse, but I think it might not be the best fit for dating.
That said, if you feel like you can solve those problems, you'd be doing a world of good if you're right.
Arrrr suite feeding jellyfin.