Behind parents' backs

how do i get internet to my computer witout my family knowing (note: family computer in liviing room has internet not mine)

Answer Person will not be a party to crime!  You could discuss with your parents a compromise where you’d get Internet access but allow them to install some sort of filtering software.  You’d be able to read this sort of junk, but be blocked from the sites you really want to see.  There are a million parental control software packages.  PC Magazine reviews some of them.