E-Snob
An E-snob is someone who talks to their friends all day online but acts like you're not worth their time if you're not on their list. They're like the kid who talks to their best friend but won't even look at you.
'You're not on my list, so I don't have to talk to you.'
'I'm in the middle of a conversation, and you're not important enough to interrupt me.'
'I'm too good for you, and I'm not even using my phone!'