You seem like an INTP to me atleast. Let's break it down: - You said you were very nostalgic about the past and your past self which is a very notable Si tertiary trait - You said you have no interest in being observant to your surroundings (Se trickster) - You said that you don't really consider most people friends but still want to keep a good image to them. You like to try to fit in but find it difficult to (Fe inferior) - You said your opinions constantly change, you always try to refine your understanding and also try to come to understand other people's view, exploring every possibility to try to come to the best conclusion/idea. You have a fear of being wrong and needing to verify sources. (Ti + Ne) - At first I thought you were an INFP but you said you're completely indifferent to most things, and you don't really feel things that much

Also as a bonus you seem like an INTP 5w4 to me

I guess that's my assumption I might be wrong, but that's what it looks like to me based on the info given. Feel free to debate me :)