Asperger's syndrome is a mild form of autism. People with asperger's syndrome are usually loners who isolate themselves from others. Although their cognitive function is preserved, they often have speech problems and motor skill problems(clumsiness).
From a psychiatric perspective, antisocial personality disorder is associated with lack of emotions. They have a reasonable childhood but later grow up to lie, cheat, and feel little remorse about the impact of their actions on others. Some of them are able to lead successful lives as adults, however they often have difficult relationships with others.
There is no effective treatment for antisocial personality disorder. People with this disorder do not feel a need to work on their issues, and therefore are not motivated to participate in therapy.
Without meeting your boyfriend I cannot make a definitive diagnosis. However, if he indeed has antisocial personality disorder, then a long term relationship with him will be very challenging.
I hope this is helpful