From Stuhlz dictionary definition, it is clear that antisocial has three subtley different meanings.
1. is how ReNo describes him/her self, which might better be described as asocial, or reclusive.
2. describes the inability or unwillingness to conform to the normal standards of behaviour in the society in which one lives. This would include loudly slurping your soup at the Ritz, dropping litter, and throwing petrol bombs at police cars. The nub of this definition is that the average member of society would find the 'antisocial' behaviour unacceptable.
3. describes deliberate acts perpetrated by the antisocial person that are targetted to anagonise a particular victim, or small group of victims. The nub of this definition is that the intended victim is meant to find the specific behaviour unacceptable.
So in short, ReNo, antisocial means both the things you describe.
But introverted or introspective or asocial are probably a better words to describe your own behaviour.
I hope that this helps.