I saw her on the road

I saw an old friend
a friend i left 6 years ago,
she was standing on the road side,
 while driving my car,
 i suddenly saw her,
and in a sec i read her face,
i park my car besides the road
and came closer to see her,
she was still smiling and laughing,
but i read her face,
which made me sad,
that night.