Can you please explain what "lost" means? ( Details inside)

Edited

When a was a young man a Lutheran university minister warned me not to become “lost” from playing D&D and reading fantasy novels from Dragonlance and Forgotten Realms books.

I’ve lost contact with the minister. So I can’t ask him.

He also warned me about spending too much time in the prayer sanctuary? I would spend all night over the summer break as it was air-conditioned and I could be left alone.