Love Unfulfilled: Of Unrequited Love

Of unrequited love, what must be said?
It's not as if that kind of love is dead,
And unrequited love for some will be,
The only kind of love they'll ever see.

The unrequited lover stands apart,
Although that love, lies deep within his heart.
To others, it may seem that none exists;
While some will say, it's there, but one resists.

A higher plane of love can set one free,
The kind of love that's in eternity,
Untouched by worldly wanton and desire,
Its passion holds fore'er a purer fire.

The lovers seem to know a passion true
And oft' for them the perfect thing to do
Is love the other lover perfectly,
But meanwhile, set that perfect lover free.

The lover is a lover to the end,
But to the world appears to be more friend;
The unrequited love will never die,
As unrequited lovers cannot lie.

For truth is love in unrequited love,
And love is truth with hope from up above.
The unrequited lover does no harm
Or anything to cause the world alarm.

It is enough to love, love at its best
And then let Love As God, do all the rest.
"I have no love but Love," they both will say
And love each other perfectly, each day.

The unrequited lover, one will find
Exceptionally good, so sweet and kind.
And marvel at the lovers, yes, one will
E'er sense the perfect peace that bides there still,

The calm serene, the joy, the perfect pose.
"I guess they're lovers?" "Do you thus suppose?"
And one may never really know for sure
While unrequited lovers stand secure.

Awaken unrequited love and find
A melody, so sweet, it does remind
The unrequited lover's melody, 
The quest for love, so perfect, blessed and free.

Why meddle in a love that is so sure?
What can be gained by taunting friends secure?
So let the unrequited lovers find
That unrequited love can ever bind.

How can you explain unrequited love?