Man! BigBen931 is right on the money!! You don't want her to see you as the big teddy bear friend that she can run to just to hang out and relax. Give her the "look". Not the 'I want you look', but atleast the 'wow you are really hot look! She knows that you are straight- right? Hope so buddy.
Good Luck with your lady friend.
Oh yeah - Go with the Austin Powers Sensual Massage!