Shadow on the Sideline

We met that day,
And became good friends,
Until I introduced you,
To a "friend" I knew.

You took to her,
Like a needle and thread,
Becoming perfect friends...
Only soon to be lovers.

Standing on the sideline,
I watched your bond grow,
I watched as you smiled,
You laughed, you cried.

At first, this made me smile,
Watching and waiting,
But before long, I realized,
That to you, it was more.

Confessing your love,
She hugged you and said,
"I love you too,"
That moment is unforgettable.

Your e-mails to me,
Ceased to exist,
And I lost a friend,
As fast as we'd met.

Standing on the sideline,
I watched your bond grow,
I watched as you smiled,
You laughed, you cried,
But I can't bear to watch,
My existence slowly fade.

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I don't care about grammar... it's from the heart, so don't be too harsh...