Apart from citing Tyrion Lannisters celebrated saying on being a good judge of character. Perhaps the most intriguing aspect of your story that I enjoyed is

My siblings are a reminder of my father's burden to me. I sometimes curse him for it, but I love those children with every bit of my blood. They still don't know.

The following quote suo moto tells it's own story but let's leave it at that.

Although I doubt quite agree wit the point you made that you're an introvert. I like to think you're an extrovert who has been humbled by life chuckles softly

Let me leave it at this before I recreate another version of your post. Well done mate!