i know this truth is not easy to believe in .. but it is.. i made the most horrible mistake help me!!!

i did something really terrible. i lied to my sister that someone is in love with her. not just from now but from last 6 years.. i was small and i guess i was just looking for fun..
now things are worst she is in so much love with that boy.she just cant think of any other thing . that she even broke off with her boyfriend of last 4 years who was a really descent guy!!! and she is in love with the person who just doesn’t exit.. there is a boy but he is not at all what i made him look like.. i cannot tell this to her she’ll never forgive me.. this act has been going since last 3 years and now i don’t know how to end it. i want it to end but i think sometimes its not easy to escape from your problems..

every time i try to end it it does never end!!! i want to make thing normal again but if i do this my sister will be broke and if i don’t someday the truth will be out and i will lost my sister………

help me…