How long does a average relationship last?

Teenage in high school?
Mine vary!
I've had some at the beginning of high school which have lasted a couple of weeks, which is really odd for me.
But now, a lot of my relationships last around 4 months to a year.
My longest relationship was almost 2 years = )

I would say from my own experience. That an average teenage relationship(not the friends w/benefits kind) lasts about 3-6 months.

Some will last 9-18 mos. But I think that most don't really get that far.

The longest relationship I've seen out of my immediate friends is about 9 months to a year. (:

However, one couple I know. I don't think they'll end up breaking up until they absolutely need to for university, etc.

From the people I see for about 2 yrs but that's if the guys have benefits if not 3 or 4 months