Your F and S are clearly a lot less important in your personality than your T and N. And you are clearly an I. This leaves INTJ and INTP as your only options. Read about them and pick one. If you are unable to decide you are probably an INTP.
As an INFJ (and a human) I find it sad that you haven't realised yet that independence and richness are usually the result of connecting with people and the outer world instead of disconnecting and cultivating a misplaced feeling of superiority.
Edit: something extra. You say: "My need is simpler - I want to express my ideas about various things and be able to do whatever I want." That's Statler and Waldorf. You are way too young to be or to aspire to be Statler and Waldorf...