Quote:
I said "that's okay, most of the girls I date have boy friends." It didn't seem to land.
Don't address your other girls when speaking with a girl.
Stop thinking in PUA terms and start thinking of boy meets girl. Moreover, imagine that this girl you are speaking with is someone who you already know. They will most often feed off of this, and enjoy it. So will you.
I could be wrong but you seem to be trying to 'game' and not trying to just banter/flirt. Be outcome independent - spread your good vibes, be loose, be informal.
A couple of thoughts.