The little things about you

The little things about you,
Are the things that I won't erase from my mind,
It's how you walk and talk to me,
From the smallest conversation to the biggest decision we have ever had to decide.

The little things about you,
Are the things that I will take with me to the grave,
And perhaps, to the next life.
It's the secret I've known for a long time,
And there's no way you could find out how I know them.