I said to girl im gonna miss her when i stop working for the same company but she went offline ?

so i really like this girl at work i told her im gonna leave this mont my work and asked her if shes gonna miss me she said yes and asked me if i would miss her i told her that the only negative thing about me stopping this work is that i couldt see her and that she made working fun but then she told me that i was a joker and she almost believed me and went offline i feel embarresed