It seems that according to cognitive function theory that it is possible to be ambiverted.
The dominant and auxiliary functions work together as a team. I think it is possible especially for Perceiving types that prefer to keep their options open (taking information in using both Introverted and Extraverted functions) to be Ambiverted.
What do you guys think?
I agree with Jung's theory that an Introvert and Extravert act so different that it is easy to tell them apart, however at times a person can be introverted or extraverted depending on the situation.
This doesn't mean it's not possible to be an Introvert sometimes and an Extravert other times- thus, putting you right in the middle.