A is a boy.
B is a girl.
A and B are the best of friends.
They enjoy hanging around.
They make each other feel secure.
They care about each other.
One day, they arrive at a conclusion that they are no longer "just friends".
They agree to take the relationship to the next plausible level.
So what changes in their relationship, then?
What's the addition to the friendship that already was a fruitful and satisfying one?
The odd moments of intimacy?
The occassional hormonal surge?
A higher level of commitment?
What really changes?