Why get married?

So a couple of weeks ago, my father mentioned that I should get married, because my daughter needs a consistent father figure in her life. I replied that she has a grandfather and two uncles, and I was not going to get married. Usually, we joke around, but from my tone, he knows that I was serious. My mother and sister, say that I am just bitter, but I know better. Men cheat. A majority of men cheat, there may be that couple of virgins that fall in love, get married, have children, and remain faithful to each other, but that is exception to the rule, not the rule. I have experienced being the one cheated on and being the one cheated with, and although some may look down upon the latter, it has been my experience in being "the other woman" the guy actually told me the truth, no illusions, I knew he was an unfaithful person, we had a mutual understanding, and when I wanted it end, it ended. Of course, there were no hard feelings on my part, because there was no emotional investment on my part. Now, on the other hand I have also been the faithful girlfriend, who (in my mind) was doing everything right, only to discover, that everything that I was giving was not enough. So after, finding the extra on-line profiles, and females phone numbers hidden under male names, and discovering hidden children conceived during our relationship, and the whole other personality/family in another country, wasting time worrying about "is he coming home tonight", putting my career on the line, being made a complete fool of, I decided enough was enough. After moving home and witnessing the hurt cheating cause my mother and my sister in law, I wonder why get married? At this stage in my life, what do I need a husband for? Morally I know that a man is suppose have a wife, and that sex within marriage is pure, and that there is an order, needless to say I didn't follow the order, so as a result I deal with the consequences of my actions, and I am grateful, so at least I can share my experiences with my daughter when she gets older so that she will not make the same mistakes I did, but at this point, I can't see, why I need a husband. I have a career so once I finally start working again, I will make more than enough to provide for myself and my daughter. And if there's some hard manual labor around the house I need done, I can pay someone to do that.  I have friends that I can talk too, and as far as companionship goes, to me the risk far out weigh the benefits. I used to want to get married so that I could have someone to have a child with, but I have a child now, so there is no need for it. As for sex, there are toys, or I could pay someone, no hassles. My daughter is the only dependant that I have to take care of, and for her I would happily do that, but as for a man, no way, no how, no more.