Honestly, just be yourself. You don't need to tell them about your stutter but if you do maybe it will make you more comfortable = less anxiety. From my experience I've never told any girl that I stutter and it's been fine, not even ex girlfriends, just until my recent one. Maybe you will find it hard at first but when you get comfortable with the other person everything will come out great. Try starting out with some small talk, see how they react and how you feel, then go from there : )