The best advice is to not live with someone without the commitment of marriage. You love the person enough to have children with him, which is a lifelong commitment in itself, but not enough to get married? Too many women settle for this arrangement because they think, "If we move in together and are happy, he will want to get married." Newsflash, sister, no he won't. He's getting all the benefits of marriage with none of the responsibilities. Where's the incentive for him to change that?
Great article over at FOXNews today about how the feminist movement has backfired on young women. http://www.foxnews.com/opinion/2012/11/24/war-on-men/