A great place to look would be when the creature tells his maker about his life after he was made and then abandoned by Victor. In particular, if you are looking for quotes that show his yearning for inclusion in human society, examine the section when the creature tells Victor about meeting the De Laceys and being a part, albeit a hidden one, of their family circle. At the beginning of Chapter Twelve, he says to us that, having observed them and their warmth and love, he "longed to join them." As he continues to observe them and learns how to read and write, he becomes more aware of how impossible it is for him to participate in human society, culminating in his demand of Victor:
"You must create a female for me with whom I can live in the interchange of those sympathies necessary for my being."
The monster recognises that he has emotional needs, but because of the way that Victor has made him, those emotional needs can never be met by fellow humans. Only another of his own kind, abhorrent in physical appearance as he, can give him the love and emotional warmth that he requires.