I'm pretty sure I'm a sociopath
What makes you think that?
I want to kill my dad. I really want to kill him.
That must be awful thinking stuff like that all the time.  The fact that you're telling me this leads me to believe you want help though, which it sounds like you need.  Go and talk to a professional about this!
Nah, a lot of cool people were once sociopaths.
There's nothing cool about having no regard for the well being of others. I repeat, you need to talk to a professional about this so that you can deal with those kinds of thoughts.