Another update. After a weekend where I talked to a lot of people of my past I'm sadly at the same point where I was before. They mostly don't know her but the few who did knew her haven't talked to her in like >5 years.
It feels kind of sad to look for her. It's as if she's a ghost, nobody cares about.
I think she's OK, at least I hope she is.

and ++ I might have send her an EMail just now. Let's wait a bit and see.