No offense, but you need to grow a set. If you like girl A your sending the totally wrong signals to her. If she made some 'specific' moves then and made it pretty obvious she is interested in you. Id bet my left one on it she's just waiting for you to make a move. Just try it, all that can happen is that she wont go for it, but atleast then you know where you stand with things. Just tell girl B that your not looking for anything other than a friendship with her. If she gets all shirty about it and doesn't like it then that's her decision. Atleast you were honest and honesty is the best thing in any relationship. Oh i forgot to mention, avoid the 'Friend Zone' at all cost. Once you in there you can kiss any hopes of anything happening with the girl