Does she know that you stutter? If not, maybe broadcast that before you two get together. That way, she knows what to expect. Maybe that will take some of the onus off of your stutter. If you both already know it's going to occur, then perhaps you won't need to pay it so much attention and that real, charming, funny, smart you can be more fully expressed. No need to worry about what she will think about that part of you; it's only one, tiny facet of everything you have to offer. If she can't accept you as you are now, then she probably isn't the one for ya anyways!