A Buzzy Bee

Hi Lexi, if the saddle is worn where the B string sits and that is causing a the buzz you could simply try using a small piece of paper to bridge the groove, this may work just fine. Secondly you can repair the saddle with a paste of ground-up plastic mixed with super glue, build the area up with the paste and then file it back to the original profile. Finally you could replace the saddle with one just the same from the guitar shop.