Try not to let it dishearten you, it's tough on the bank as your constantly new to the areas- I have the same problem on the bank, I've been doing a lot more shifts lately and you do feel like the new kid all the time but as time goes on it gets easier
stay on the bank, give it time- the more experienced you become the easier it will be
try and block book on a specific ward, if you can do that- like what one of the other posters had said introduce yourself say that your a student nurse
Just think of it as all part of the experience, when you qualify it will give you a stronger idea where you may want to work, also when you go full time in an area that you know you won't treat the bank staff- like you once were treated, you will gain knowledge that may never be taught at uni/ placement, you'll see things that you may never get to see on placement