Although Louis does not
like being alone, Claudia genuinely cannot survive on her own. Because she looks like a child, she always needs someone else to secure certain necessities for her. As such, as soon as she senses that Louis might leave her, she finds a replacement. However, previously, Louis swore that he would never turn anyone else into a vampire. He knows the problems with being a vampire and does not want to condemn anyone else to his fate. Still, Claudia is the most important person in the world to him, so suddenly he must call his previous promises into question.