Is marriage an institution?

I get very confused on this. Whether it is a necessary evil or not is the same question to me as whether God exists or not. Both are confusing. You cannot have a definitive stance over it if you are open to subjectivity. For those who are married, it is amost sacreligious to even question the necessity of marriage. I have heard that after an age you tend to seek a partner. I am approaching thirty and societal pressures are abounding. But, I am clueless what to say. Without a rocking job or the mentality to do it, without a healthy lifestyle meant to be compatible for the spouse, without the excessive urge or rather obsession of sexuality, without the longing for a partner and finally without any ambition, I get very confused whether i should go for it and spoil two or more lives in future. With the nature I possess, I would like to die in hunger alone. To initiate a family might become hazardous. A DNA defect again perchance.
When I declare that I do not have the urge to have any materialistic pleasure barring booze and I feel detached, my father comes up that maybe sunbconsciously you need marriage. I get confused on how my subconscious does not reveal like this to me with this kind of certitude. Maybe my dad is correct. But if he is not, few lives will be doomed forever for sure. With due apologies to all the married ones and also to those who strongly believe in the institution of marriage...