Introvert or Extrovert?

If I am asked which I am introvert or extrovert, I will say I am introvert. There are some reasons why I think that I am introvert. First of all, I like being alone better than doing something together. I do something with my best friends whom I really believe. Second, I can't talk with someone whom I first meet. I'm too shy to think what I should talk with them. Finally, If I have some problems, I don't talk with anyone usually. I try to solve by myself. I don't know if introvert is good or not. However I think I should become extrovert more, and I try to become extrovert more.