Do you two have each other's email addresses?
Yes, we do. I tried sending an email too, but no answer yet.
Is this going to be another of those "missing girlfriend" cases where the guy has never met the girl in real life and knows nothing about her?
Yes and no, I suppose. Unfortunately we haven't been able to meet in real life yet, but we have been in this relationship (whether you consider it an actual relationship or not, that's another thing) for a relatively long time now, and we DO know each other.
But I understand why you asked that. Long distance, not having met in real life, only talking over the internet, ... It can sound very questionable. Someone could be not telling the truth about themselves or cheating on the other. I know, people have told me that same thing a few times before.
That's one of the reasons I was reluctant to say "girlfriend", and considered saying "friend" instead. But it is what it is.
But I need to say, there were health issues involved, and my guess is that's the reason I'm not hearing from her. Nothing to do with knowing nothing about her, like you say.
I can't prove you that what you say is not true, so I guess you will have to take my word for it.
With that said, I would like to find this person, and I would like some help.