No you definitely dont need an apple one. If you have a computer with bluetooth, I would highly recommend the logitech V270 bluetooth mouse. its small, simple, and looks great. matches a macbook pro perfectly. and no annoying usb wireless plug or cord. also, having a right click is nice, i use it all the time when i use the mouse.
Here's a link to purchase it online, and they also probably have it at your local apple store: