The three are touch choices but I think I'd rather be trapped by marriage. With marriage, you have a modicum of freedom that comes along with it and, presumably, the husband would only want to do "his duty" to get an heir. Then one would have their children, friends, and family to keep them entertained - all with the respectability and status of being in a marriage. And, who knows.... Maybe one could entice the husband to fall in love, or at least realize that he liked you enough to want to try to see you happy.