It was all my fault and I know

I know that fault was all mine
And I know this was really not destined
But what if I say that I had to pay
The brunt of not believing you
I also had my reasons to few
Now I realize the importance of
Losing a lovely friend like you
A friend who was my support in life
A friend who had a role all new
My best friend I really want to see you again
As I know that I am missing you!