My sister lived alone but she talked to herself constantly. She would also have long conversations with other people not present - like me! Personally I consider this an example of getting a bit weird. But my sister didn't care. She also talked to inanimate objects, like to the television or radio. I don't do any of this. I have started to laugh aloud if something is funny in a movie I am watching or something on the Internet. But even that feels weird. I NEVER cry when I am alone. You are right that being alone all the time creates boredom and the state of being lonely.