Every human being needs love or companionship to survive. In the book"Frankenstein", the monster realizes that he is in need of this. There are a few reasons why having love or a companion is important.

One reason humans needs companion is because we wouldn't be able to compare ourselves to anything. This means we will have no way to experience who we are. For example, we can call ourselves nice or generous but you really don't know that unless you have someone else to share that with and help define it. Having a companion can help us to understand who we are and what we want to be.

Another reason why companions are importan to humans is because we need someone to share life with. It is much easier to lives ones life while sharing it with a person you love. One can not survive the world alone, you must work together with someone to stay a whole.