The opportunity for youngsters to share their problems through texting, email and social networking sites such as Facebook has never been greater.
But excessive discussion - known to the experts as co-rumination - can be unhelpful.
They were contacted again a year later to follow them up.
The girls were tested for depressive symptoms on both occasions and asked about romantic experiences considered normal for early teenagers, such as having been asked on a date and having been kissed.
Repeated conversations among adolescent girls, particularly about romantic disappointments, worsen their mood and create negative emotions, according to the study.
'There is a wealth of communication technology available to teens today that allows them to talk over and over again about the same emotional difficulties,' said Dr Joanne Davila, the psychology professor who led the research.
Higher levels of discussing problems with friends were 'significantly' linked with higher levels of depression, according to the report in The Journal of Adolescence.
More romantic experience was linked both to excessive talking and more depressive symptoms.