I accidently broke my hymen when i was 15 . now i'm 21 so i want to know if once the hymen is broken does it heal-back???

It does not: The hymen does not grow back or regenerate once it is broken.Keep in mind, too,that around the age of 15 or so it is meant to degrade over a period of time that is different for each woman.If you are concerned whether this still makes you a "virgin" that all depends on your definition of what a virgin is.To me,if you have not had vaginal penetration by a penis or finger or tongue, you are a virgin