AdamEngineer dude!
No fear of rejection, social setting (reduces rejection, ya will interact in the environment) by now ya will know these girls or at least some not to mention ya have written yourself off already so there's no pressure.
Go an strike a conversation with a stranger, it's different to talking to ya friends dude.
Then look at the environment, loud clubs or bars, distractions, music, girls can be on guard cause they expect to be hit on by drunk guys.
Tell me about ya hobbies dude, ya will feel confident. Tell me about something ya don't know an ya won't be confident.
Confidence comes from success, ya can't be confident when it's unknown. Yet another reason to assume attraction, this will bring confidence dude
