Can she report me?? can i report her?

Don't get caught in all the talk. You have a life so go ahead and live some. Who cares what she says. Tell your bf that you are not affected and don't care for her rumors. You can boldly say that you have had feelings for xbf and it happens. We are all humans. He should understand and move to next level in your relationship. Don't be caught in all the talk and no fun. Good luck.