Referring to oneself in plural when conversing with oneself in the mind is not unheard of, and in many cases, it can be considered normal. This phenomenon is known as "plural self-reference" or "pluralis modestiae" (the modest or royal "we").
There are a few potential reasons why some individuals may use this form of self-reference:
Coping mechanism: Using plural self-reference could be a subconscious coping mechanism to distance oneself from negative thoughts or emotions. By using "we" instead of "I," it might create a sense of emotional separation, making it easier to handle difficult or distressing situations.
Influence of language and culture: In some cultures and languages, the use of the plural form when referring to oneself is considered more polite, respectful, or humble than using the singular form. People who grow up in such cultures or are exposed to these linguistic patterns may incorporate them into their inner thoughts.
Inner dialogue as a conversation: When we think or engage in inner dialogue, it is like having a conversation with ourselves. Using plural self-reference might be a way of acknowledging different aspects or perspectives within ourselves, treating our thoughts as different individuals with unique points of view.
Comfort and companionship: Referring to oneself in plural might create a sense of comfort and companionship, as if we are not alone in our thoughts. This can be especially true for individuals who are feeling lonely or seeking solace in their own minds.
Personal preference or habit: Sometimes, it can simply be a personal linguistic quirk or habit that a person develops over time without any deeper psychological explanation.
It's essential to note that plural self-reference is not indicative of a mental health issue or a problem in most cases. It's a relatively common occurrence and not considered abnormal. However, if this usage of "we" in your inner dialogue is causing distress, interfering with daily life, or is accompanied by other concerning symptoms, it might be beneficial to discuss it with a mental health professional. They can provide a more personalized assessment and guidance if needed.