DO I HAVE BULIMIA NERVOSA?

WHEN I AM ALONE I EAT.ALSO EATING IS ALL THAT I DO,WHEN I AM SAD I EAT.AND WHEN I WAS WITH FRIENDS I EAT AND WHEN I EAT MORE FOOD,SEE I FIND OUT THAT THAT IS ALL THAT I DO IS EAT,SO DO I HAVE BULIMIA NERVOSA OR NOT SEE I DID SOME QUESTION TO SEE IF I A EATING PROBLEM AND AT THE END OF THE TEST IT SAID THAT I HAVE BULIMIA NERVOSA I WAS LIKE NO WAY BUT I DID ANOTHER TEST IT CAME BACK THE SAME THING THAT I HAVE BULIMIA NERVOSA,SO WHAT IS BULIMIA VERVOSA ? SEE I HAVE NEVER HEARD OF BULIMIA NERVOSA AND WHAT CAN I DO ABOUT THAT