I don't know if this girl like me or just want to be friend?

Well she's told you exactly what she wants and that's to be friend. Her ex boyfriend obviously did not treat her right so she probably just wants to be single for a while. Don't start ignoring her, she clearly wants you as a friend so still keep in touch and start trying to avoid her. She tells you her personal stuff which shows she trusts you. Maybe she does not want to be in a relationship right now, but she might later on, so don't avoid or ignore her since it'll just ruin your friendship with her.