I need a bit of advice on how to respond/react to the following situation that presented itself and hope you guys can help. A little background info;
I was in a pub with a group of friends and while we were outside having a smoke, an old acquaintance (girl 1) made a bee-line for me and said that herself and another acquaintance of mine (which there have always been chemistry but things have always got in the way. Girl 2) were talking the other night and were saying we should all get together and hangout and that girl 2 really missed me etc. Reading this as a 'can you give me your number so I can give it to girl 2' situation, I said that it sounded like a good idea, and suggested girl 1 and myself exchange numbers and we'll arrange something.
I texted girl 1 the following day, which she responded quickly to and finished the text by saying 'girl 2 is very excited about it'. Although I don't have girl 2's number, she is on my FB, would it be advisable to cut out the middleman so to speak and if girl 2 is interested she might respond on FBmessenger, although this feel s a little bit creepy and possibly DLV.
So my question is this, how do I escalate this as I don't have girl 2's number and may come across strange if I ask girl 1 for it and how do I progress it in such a way where I don't come across pushy and DLV?
Thanks in advance.