These findings, to be presented today in Honolulu at a meeting of the American Psychological Association, are the latest to shed light on a problem that has only come out of the shadows in recent years.
Boys and girls who have been victims of dating violence are more likely to get into fights, carry a weapon, use alcohol, use marijuana or cocaine and have sex with multiple partners the study says.
Researchers don't know if any of these events causes the others, however.
For example, they're more than twice as likely as others to consider suicide.
Boys who have faced dating violence are nearly four times as likely to have been bullied online; girls are more than twice as likely.
In this 2010 photo North Plainfield High School drama students Luis Salazar, right, as "C.