Bit confused mate, topic title suggests you didnt get their numbers?
Not quite sure what you want suggestions on?
If its striking up convo. I wouldn't bother on FB, arrange a night out and invite her and some other people along and take it from there. It may just be that shes not into you in which, case I'd just move on.
imo ... Facebook isn't the best place for meeting / chatting up / continuing your sarges... only because I hate doing that kind of thing through the wire, i'd much rather face-to-face and take it further at least that way you can read the girls, its the same with SMS messages... everything can be taken different ways...
If I've totally misunderstood your question, elaborate and I'll have another go
