Complex sentence: Stacey also feels that it is his responsibility to take care of the family; he has grown up and has become more emotional and territorial towards his family, which is why he goes for the job in Louisiana.
Split into simpler sentences: Stacey also feels that it is his responsibility to take care of the family. Stacey has grown up and more emotional and territorial towards his family and that is why he goes for the job in Louisiana.