I agree with this 100%: People should generally be free to live their lives in whatever way they wish, as long as they don't harm anyone else. The problem, though, is that "sociopathy"/antisocial personality pretty much means, by definition, behaving in ways that are harmful to other people. OP has already admitted to manipulating and taking advantage of people in various ways without concern for any harm he might be doing to them.
OP, please do seek whatever treatment is available, if not for the benefit of the people around you -- which (again, by definition) you probably don't really care about -- for your own good. As others have intimated, sooner or later you are going to hurt someone who decides to hurt you back worse, or cross a legal line and wind up in jail. It sounds like you've been very fortunate so far, and you haven't suffered any serious adverse consequences of your actions, but it's just a matter of time before your luck runs out.
Also, please do not be reluctant to pursue a psychopharmacological treatment, if an effective one is available. The practice of "medicating" psychiatric patients got (appropriately) a bad name back when "medication" generally meant "sedation": It wasn't so much a treatment, but rather a convenient way to make the problem go away by turning people into zombies. (Think "One Flew Over the Cuckoo's Nest.") Psychopharmacology has come a very long way since those times: We know a great deal more about how the brain works, and medications today have much more precisely targeted effects with fewer undesirable side effects. Your problem is that parts of your brain are not operating "normally." If there exists a drug that can "fix" that, then it is worth trying. If the underlying problem is biochemical, then it just makes sense to seek a biochemical solution.