Surprisingly at ZoZo --- Company, followed by flirting, followed by sexting, followed by friends.
IRL - It depends on the girl/ partner ---- Or the guy too. I know some friends in life - who got nothing better to talk or do or think about - other than sex, some cherish company, some are very good at flirting and at the same time not crossing the comfort zone, some treat everyone like a lady - irrespective of their looks/ behavior, some need company and some friendship - it depends on who we are and who they are as well.
They need a person who can be understanding, just being there when needed will do.
Option 4: No (Only? seriously?
Option 2,3 solve option 1
I ain't sure if you can comfortably flirt with every friend as a man but every one you flirt who is comfortable can be considered a friend. so Flirt I guess