I'm going to ghost my now former best girl friend
Are you planning on leave her?
I just did it via dropping all my social media accounts after dumping her.
Ghosting people is a short term fix to not wanting to talk to them any longer. If you want to do things the right way, talking to this person would at least give them some clarity on why you are choosing to ignore them. It seems kind of rude.
What! I did this and it is going to hurt her feelings so much on purpose.
It is wrong to just ghost people and shut them off. If they get really worried they might call your friends and family and ask if you are ok or not.