Sounds like you really identify with some schizoid traits. Keep in mind you need to have at least 5 of the 9 for a diagnosis. Also, some traits might be more mild or more pronounced, and the intensity of those traits can vary a bit throughout your life. Schizoid traits go deeper than just introversion. Some of the things you described do too.
Honestly, nobody here can diagnose you. Just keep thinking about it and learning more. You know yourself better than anyone else. You'll come to a conclusion sooner or later, and once you figure it out, you'll still have to answer more questions, like what do I do about it? in what ways is it helpful, and in what ways is it not so helpful? am I happy, or do I want to try to work on some things? etc.