I live with roommates in college, and I don't mind that. I have my own room and everything. I think I would want to live with someone later on too. I would have to really love the person, though. I would never settle for a relationship without love just to have someone to live with. I bet some people do it. I bet that's how a lot of women end up with the douchebags. (and vice versa) They get used to dating someone, feel comfortable, and are afraid no one else will come along.
heck, I don't know if I even believe in marriage. I don't know if I believe in love.