Does this mean someone closed their account?

Boo left that on his profile. It means he is taking a break from here. I miss that friend. I know he is okay though.

They went on hiatus for the time being.

It might, my guess is that they have been inactive for some time. I haven't seen that yet.

I took a break and u can come back. The account is urs again.

No it means you put his account on vacation

Okay thank you all.

It shows up when you choose to leave. If you reactivate then you are back as if nothing ever happened. The only way to be really gone is to piss off the admins.