“No, not those. There are many many more. You’ve outgrown this world long ago. You were meant to walk the planes. You are a sort of god now. Perhaps a young one, but a god none the less. It’s time to leave.”
Suddenly a portal opens up. Serena approaches it and beckons you to come with her.
This seems to clarify things, though leaves it very vague if Serena (the ghost ex-gf) opens the portal for you or someone/something else.
If EndMaster can clarify this up.... =)