How do I talk to my parents about me possibly being depressed?

Your tiredness is the side order u get when your depressed. It seems like you don't fit in cause of your depression well in my opinion the only person that can really help you is you yourself but there is no harm in taking a little help go to your family doctor and tell him what you have written here he can give you medication that will help alot once the medication kicks in you will be able to see more clearly all the good things that lie ahead for you and your energy level will return along with optimism for life and your surroundings.