well if you went shopping together how bout a dinner maybe? try something open (I think southbank is a good place) and then go for a walk and see what happens
hey don't complain i am still single and gathering dust and had no interested showen towards me for a long time.
make the most of what you got :
chick at work your not sure about :
ask if she wants to get a coffee at dinner break and see if she seems interested
chick that likes you:
ask to come out in a group and after a while it should become a good freindship
the third chick:
give it time and send a couple funny emails to her and see what the reaction is
as for the blind date that your bro is setting up:
go for it what the hell you at least get to have some fun and you never know