Not 'bad', just immoral and foolish. Unlike liberals, most conservatives hold their moral beliefs as important as their political beliefs. Morality aside, shacking up with a woman is simply playing at marriage and committment and although it can lead to marriage it can also lead to a brief marriage and an inability to trust and commit to a real relationship down the road. Your loss.
As the article in question states, the liberal feminists helped make this situation, where otherwise decent young women would shack up with otherwise decent young men, play house and act all grown-up, only to split when it became boring or problems arose, which is, sadly, what will probably happen to you.
The women believe this is normal and 'liberating' and the men simply take what's offered by the women; free sex with no need to commit to anything. A boon for guys, a losing deal for women, and they still believe this kind of bahavior is 'liberating'. Foolish. Your father's agreement with this shack-up situation you've gotten into is also pathetic but, again, rather typical of many parents who still believe that 'getting some' is the mark of a son's manhood and 'getting some' with no committment on the man's part, even better. Wrong and misguided.
As I stated, FR members may share your conservative political views but feel bad that you use a foolish, misguided girl for your pleasure and see this as something to be proud of and brag about. Having sex doesn't make you a man. Being a committed husband and (eventually) father does. When you grow up you'll (hopefully) learn the difference.