It is recommended that the poster be comforted from a distance.
It would be beneficial for the questioner to consider the following:
The questioner is unable to open themselves emotionally, and thus unable to accept the world and the people around them.
Furthermore, the subject has not expanded his social network, instead isolating himself, which may be a contributing factor to the questioner's current situation.
The questioner's life appears to be devoid of excitement and emotional stimulation. It is possible that the questioner has consistently led a tranquil existence, lacking exposure to the myriad wonders and peculiarities of the world. Consequently, there is a paucity of opportunities to evoke emotional responses.
Another point to consider is the age of the questioner. If they are in their 20s, this state of mind is actually quite normal.
Given that the individual in question has recently reached adulthood, it is understandable that they may not yet be fully accustomed to the nuances of adult life. It is possible that they have already begun to develop their own cognitive model in response to this newfound reality.
The formation of a fixed way of thinking may also be attributed to the understanding of the world in one's own way. It is also plausible that the questioner is highly mature in their outlook.
If the questioner asserts that increased socialization will result in a greater distance between themselves and the world, it may indicate that the questioner is resisting the idea of letting themselves become more social, and perhaps you are similarly resistant to the idea of socializing, which has led you to seek reasons to maintain your distance from the world.
It can be reasonably argued that a lack of social interaction results in a sense of isolation from the wider world. Engaging in outdoor activities, such as a walk, may facilitate a reconnection with the world.
Indeed, the manner in which one perceives the world is a matter of personal autonomy. Should the inquirer aspire to a particular mode of existence, they are at liberty to pursue it.
The fundamental question is whether one is content with one's current state of being. If not, one may choose to pursue a course of action to bring about a change. Conversely, if one is at peace with oneself, the question of change becomes moot.
It is important to note that regardless of whether one chooses to distance oneself from the world or not, one's presence is already a part of it.


Comments
I can sense the depth of your feelings and how isolating it must be to feel like an outsider in your own life. It's important to acknowledge these emotions, they are real and valid. Maybe finding a creative outlet that resonates with you could help express what words cannot. Art, writing, or music can sometimes bridge the gap between us and others.
It sounds incredibly painful to feel so disconnected from the world and from yourself. Sometimes professional help can provide tools and perspectives that friends or family might not be able to offer. Therapy can be a safe space to explore these feelings without judgment.
Feeling like an NPC in your own life can be a result of trying to fit into roles others expect of you. Perhaps by identifying what parts of those roles feel authentic to you, you can start to build a more genuine connection with yourself and others.
The feeling of being out of sync with the world is something many people experience at some point. You're not alone in this struggle. Joining communities or groups that align with your interests might help you find a place where you feel less like an observer and more like a participant.
It takes immense courage to admit when we feel lost within ourselves. Have you considered speaking with someone who has had similar experiences? Peer support groups can offer understanding and validation that can be hard to find elsewhere.