to be honest i think a casual "hey" would be best if you like this guy, if its someone you've never met ask them who it is and then do whatever your instincts tell you.
Just walk over him and say hi!
most of the time yes. But if you and a guy are only having a hi to hi conversation, he may not be into you, maybe just as a friend. hoped this helped.
Hello guy I haven't talked to in over 3 years. How are you?
Say hi back!
just do small talk and say hi
just be your self. go over to hem and say hi. its just like flirting with a girl only your doing it with a guy
Just say hi, to be on the safe side. . .
Well first you need to know if he is a nice guy. If he is your chances are that if you walk bye and randommaly say hi, he will say hi back. If he's mean he might not say hi back because he doesn't know you.
Go up to him and say hi
You might have to do it yourself.
go near him and count to 10 in your head and then when he looks at you then say hi
Nothing. He is being nice. Say hi back.