General:
* Introspective: This word refers to the act of examining one's own thoughts and feelings.
* Self-reflective: This word emphasizes the process of thinking about oneself and one's actions.
* Contemplative: This word suggests a deep and thoughtful consideration of internal matters.
More specific:
* Inwardly: This adverb describes the direction of focus, indicating that it is directed toward one's own thoughts and feelings.
* Internally: This word refers to the state of being within oneself, rather than outside.
* Self-absorbed: This word describes someone who is overly focused on their own thoughts and feelings, to the point of being unaware of others.
Figurative:
* Introverted: This term describes someone who is primarily focused on their own inner world and experiences.
* Solitary: This word suggests a preference for being alone and away from others.
The most appropriate word will depend on the specific context and the nuance you want to convey.