Someone said I am anti social, what does she mean, what does anti social mean?

Maybe you ought to ask Anthrax...
Seriously, though, this may help:
www.psychiatry.org/.../antisocial-personality-disorder-often-overlooked
Antisocial Personality Disorder: Often Overlooked and Untreated
In words, from the Merck Manual:
www.merckmanuals.com/.../antisocial-personality-disorder-aspd
Diagnosis of ASPD
>>> Clinical criteria (Diagnostic and Statistical Manual of Mental Disorders, Fifth Edition [DSM-5])
For a diagnosis of antisocial personality disorder, patients must have
>> A persistent disregard for the rights of others
This disregard is shown by the presence of ≥ 3 of the following:
* Disregarding the law, indicated by repeatedly committing acts that are grounds for arrest
* Being deceitful, indicated by lying repeatedly, using aliases, or conning others for personal gain or pleasure
* Acting impulsively or not planning ahead
* Being easily provoked or aggressive, indicated by constantly getting into physical fights or assaulting others
* Recklessly disregarding their safety or the safety of others
* Consistently acting irresponsibly, indicated by quitting a job with no plans for another one or not paying bills
* Not feeling remorse, indicated by indifference to or rationalization of hurting or mistreating others
Also, patients must have evidence that a conduct disorder has been present before age 15 years. Antisocial personality disorder is diagnosed only in people ≥ 18 years.
Antisocial implies an active dislike of other people and being around them - someone who is antisocial will, in a sense, really not like other people.
Opinion
3Opinion
U are not a social person or u try to avoid social situations at all cost
You are a person that avoids and doesn't like to socialize
A Google search will tell you exactly what you're looking for
Superb Opinion