What can I do now (fortnite)?

I and my girlfriend want to play together but unfortunately I can't find them at all! She gives me her real name there but the stupid system does not accept her! What can I do now so that I can still play with her?

Your right real or your play name?

Did you try the other way around too, so that your friend sends you an inquiry? Otherwise, maybe try via e-mail, if that works (Unfortunately have not played Fortnite for some time, so it is a bit difficult to give better answers).

Fortnitename