Greetings(9 sentences)

(To any of you firends, you can use these)
How's everything?
What's up?
what's new?
What's happening?
(You can use these anytime,but they sound like that you are not that close)
How are you?
(for the first meeting)
Nice to meet you.
(To the people you know,but you don't know them well)
Nice to see you again.
(To your fiends that you haven't seen them for a short time)
How have you been?
(To your firends haven't seen for a long time) Long time no see.