It's an interesting question actually.
I did make one of my best friends from social media, but that is an exception. I luvs her.
Someone said upthread about not distinguishing between media and friendship, I agree with that.
However if I'm trying to repeat something to an IRL friend I just say "someone" or "my friend" said this; it's not that I have delusions it's just that I would be embarrassed to admit my Internet usage and say I use xyz forums
I have been in a difficult situation and relied on the Internet too much. However I do know what a true friend is.