What was my MISTAKE?

The rainy day i still remember,
You were moving away i felt,
What in the world was my mistake?,
Where in the life did i go wrong?,
You left this heart alone,
Broken pieces,
Don't look away,
Is all i could say,
I cried,
I felt i won't survive,
Where in the world did i go worng?
I could still remember,
A non reason bye,
Tears in your eyes,
Pain in your heart,
Most hurtful goodbye,
Most dreadful cry,
Here i am writing again,
Remembering your ignorance,
All i wanna ask again,
What in the world was my mistake?,
Where in the life did i go wrong?