How can you get your girlfriend to change if every little thing becomes big and she punishes you for things that are not said or done her way and she's very negative?

FIRST YOU SHOULD GET A PREGNANCY TEST IN MAKE SURE SHE'S NOT PREGNANT OR ON HER CYCLE THAN IF NEITHER ONE OF THOSE ARE THE ISSUE MAYBE YOU ASK HER TO MANY QUESTIONS INSTEAD START DOING THING AND MAKING DECESIONS FOR YOUR SELF AND SOME FOR HER JUST TAKE CONTROLL LITTLE BY LITTLE BUT WHEN SHE DO FUSS AT YOU DON'T FUSS BACK FIRST LISTEN THEN AFTER A WHILE "A FEW ARGUMENTS LATER" START DEFENDING YOUR SELF BUT WHEN YOU DO HAVE MERCY MAKE IT SEEM AS THO IT WAS THE BOTH OF YOU ALL FAULT AND LATER INSHE WILL FEEL EMBERASSED IF THIS DON'T WORK THAN TRY DOING NEW THINGS WITH HER AND EVEERY TIME SHE GET MAD LEAVE DONT ANSWER YOUR PHONE AND DONT GIVE HER THE TIME OF DAY UNTIL SHE CAN RESPECT YOU IF SHE CANT DO THAT THAN MAYBE YOU SHOULD RECONSIDER YOUR RELATIONSHIP.