<human>: Can you give me the gist of the text in a nutshell?

My friend [21M] and his girlfriend [20] have been on the rocks for a couple months now.  Me and him talk about it semi-regularly and I'm at a loss of what to say at this point.  They've talked about breaking up a couple times, and very recently used those specific words, but have decided to stay together.  I've told him in the past that I think their relationship is ending and it'd be better to end things quickly than draw them out.  However if it's possible that they could fix things up and still have a loving relationship then I would want them to stay together.

I want to be able to give my friend some good advice but my experiences are limited just like anyone's.
<bot>: Have you ever had a relationship continue to be fulfilling after seriously talking with your partner about breaking up?  How did things pan out?