Hardest Promise

The hardest promise I've ever had to keep

My tongue is sore from biting it;
My eyes are swollen red.
I hear what you tell me,
But I see what you won't say.
And I meant it for always,
When I promised to be your friend.
But it hurts me to watch this,
For I’m not an objective observer.
If you were any other friend,
I'd tell you to be sure.
If you were any other friend,
I'd tell you to yourself be true.
If you were any other friend,
I'd break my promise
And tell you I loved you.