Extrovert or Introvert?

I have still came to no conclusion wether I am a extrovert or introvert. I am a extrovert most of the time. I do love hanging out with my friends. People tend to be either very lovely or very annoying. Sometimes I just need to hang out with people to be happy. I do depend on a lot of people for happiness even though that is an extreme no. When I am alone I tend to just ponder on sad thoughts. I just tend to be around people when I am sad.  If I am very annoyed I tend to not want to be around anyone. That is when I turn to the introvert stage. I just need to be alone and collect my thoughts to be calm again. I am completely introvert if I am around people I cannot stand. In other words I am completely sociable when i am around people I love. I have come to the conclusion I am neither and just maybe a typical person, maybe, but I tend to stay alone a lot. I do like being alone, but I do not like feeling alone. I lied, I have come to no conclusion. The world would not be better with either just introverts or just extroverts. I feel if there was mainly introverts no one would talk about their feelings. I do not think anyone would be able to do many jobs. When it comes to some particular jobs like real-estate you do have to be straight forward and a bit harsh to sell houses. If the world contained just extroverts, I do not know if everything would be okay. It may be better, but I do think everyone having different personalities is better.