How many of you maintain your relationship?

I had a boyfriend from 15-19 we lived together for two years and broke up for many different reasons. I think it depends on the maturity of the person wether or not it will last in college if the girl sleeps around or the guy shes with just is using her then it probally wont last. its up to your friend to see these signs and to determine if they are in a serious commited relationship.