Victor has always said that he is in love with Elizabeth. Since his childhood he has known her. However, when he leaves to the University of Ingolstadt and makes the monster, he cuts out his whole family including Elizabeth. What to make of this? He loses contact with Elizabeth for so long that she writes to him asking if he has found another love.
Frankenstein proves on many occasions of his self-absorbed way of thinking and how obsessed he is with his ideas of creating a being. He proves this when he finally marries Elizabeth and knows the monster has told him that he will show up and kill him. Thoughtlessly, he leaves Elizabeth alone while he checks out the downstairs of their honeymoon lodge. This shows that he is not a very clever lover and that he did not completely take Elizabeth’s well being into consideration. In the end, it was her who suffered and Victor still was alive. Victor lacked of commitment in Elizabeth and she died because of him.