Conflict can be created in various ways. The boring "person vs. person" or "person vs. nature" aren't always the case. Plenty of times it's one idea versus another, and a person just placed in the middle of it all to show you the problems and how they exist, or don't exist in some cases. In stories it can be created with what is, or is not said, by a character's actions, by events that happen in a character's life, and actions of the character or the people around them. Basically, anything that makes your life a living hell, probably would in a book as well.
I always love to read "person vs. self" because having to fight with your own self usually provides a more interesting outcome than another person. To discover something new about yourself from maybe an event or what someone has said always has conflicts because nothing is really defined about humans. All we know is what we learn and choose to accept. To read, (and write) about that always is (simply put) cool.