Can you discuss the emotions in Frankenstein?

At the heart of the horror of Mary Shelley's
Frankenstein is not so much the terror felt toward the creature, but the
terror of being unloved.  For, the emotion of loneliness is central to the fear of the
three major characters. 

In his letters to his sister,
Walton tells his sister of his loneliness.  Although he is surrounded by crew members,
he cannot find a kindred spirit among them:

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You may deem me romantic, my dear siser, but I
bitterly feel the want of a friend.  I have no one near me, gentle yet courageous,
ossessed of a cultivated as well as of a capacious mind, whose tastes are like my own,
to approve or amend my
plans.

Thus, the emptiness of
the Artic through which he sails reflects the emptiness of his life. When Victor
Frankenstein is taken on board, Walton feels great eagerness to communicate with him. 
But, sadly, Victor dies and Walton is not able to share his feelings with his new friend
who is so despairing and melancholic.

While Victor
Frankenstein does have a friend in Henry Clerval, it is not a friendship as defined by
the Romantics in which feelings are shared and the intimacies of one's mind were
revealed to the other friend.  Victor remains intellectually remote with Henry, and this
causes his isolation.  This intellectual separateness of Victor is at the heart of his
inability to relate to his creature, which effects the terrible loneliness of this
creature as well as his own.  Victor expresses gloom, misery, despair, melancholy in a
Romantic fashion, but he never acts upon these expressions giving them action and
reality. Thus, it is Victor's lack of emotional connection, his lack of feeling, that
causes him to reject the creature he has created.  This is the true terror, a terror
caused by loneliness. 

Separated and rejected by humanity,
the creature portrays the horror of complete and utter isolation and its resulting
loneliness.  Posessing a loving heart, the creature is devastated by his alienation from
humanity.  For this reason, he vows to make himself deserving of this rejection by
wreaking vengeance upon Victor's family and friend and by abandoning the emotions that
have made him more human than his creator. In his murderous acts, he brings the terror
of loneliness closer and closer to his creator, Victor.  Yet, as Victor dies, the
creature expresses his love for Victor, evincing his real humanity, his capability of
being a friend in the Romantic definition, proving what the father, M. DeLacey tells the
creature before the others enter:

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"The heart of men, when unprejudiced by any
obvious self-interest, are full of brotherly love and
charity."

Certainly, one of
the truths of Shelley's Frankenstein is the value of true emotion and its sharing with
others.  Without it, one risks the terror of loneliness and
isolation.