At best, he seems to be a normal toddler with his own personality. At worst, he may be asocial, or suffering from a dysfunctional brain disorder not unlike autism
. I mean, not the full blown picture of autism but related to it. Related disorders may have just a few of the features of autism such as the inclination to not speak, or the need to be alone, to play alone and to not socialize. Please take him to a developmental pediatrician
for a proper evaluation.
= Dr Taher