If I just vanished, do you think you'd manage?
Or would you disappear right beside me?
Do you think you're ready when I go unsteady?
Lover, please prepare for my absence

Angst time! You always knew what you have with Vergil is temporary. He seemed to be searching for something and whatever it is, he found it. Now, he's planning to raise the Temen-ni-gru and something tells you that he doesn't plan to come back. I've left details up in the air so feel free to be anything but you're his somewhat lover, labels are up in the air.