I'm going to ghost a girl
I am sorry to hear you would do something like that. What would you ghost her for?
I'm tired of this online dating game.
I think that you should at least tell her you are not feeling it. It can be mean to just completely cut contact with someone.
Naw, it's not like I used her for anything. She wasn't even that good looking.
It is expected to communicate with someone when you end a relationship. You will be thought of as much more mature if you try to handle your affairs better.