Should I Have A Twin?

I'm not sure if this constitutes a psychic experience or anything, but I just had to get advice.

I'm the elder of two children. My younger brother, a year younger than me, has Aspergers and ADHD, and I've spent the better part of my life helping my family take care of him. We're really close, as far as siblings go, but it seems as if sometimes, we're strangers to each other. I also have two little half sisters, both of which are much younger than me, and I'm not as close to them.

For just about all of my life, I've felt alone, empty. Like something was missing. I've struggled a bit with loneliness, abandonment issues, low self-esteem, and minor depression. Sometimes, I'd cry myself to sleep at night for no reason. One day, I read an article about Geminis in the zodiac, and it occurred to me how like my zodiac sign I was. My first thought was, "That's so me! I'm like two people in one body!" Then, as I thought about it, I realized that since the Gemini sign had twins, shouldn't there be physical twins, and not just little ole me? (Funny thought process, I know.) I thought, "I should have a twin!" When I really thought about, it felt right, like somehow having a twin would make all of my issues go away. It isn't wishful thinking- I really believe that I should have a twin. I've always felt like that little part of me is missing, and now I believe that that missing part is a twin.

Does this make sense? I know it sounds a little farfetched, but can anyone tell me if what I'm feeling is true? Should I have a twin?