If things had grown truly terrible and they couldn't tolerate you any longer, your ex would have moved out or suggested that you do so as well. In other words, the fact that you are still in this position of limbo in which you are not formally together but yet live under the same roof shows me that there is still hope for your relationship. Your ex may be using you as a place to stay while looking for another apartment or house, or he/she may even be planning to move back in. This is why I say there is still hope for your relationship. If you weren't interested in getting back together then my friend, there would be no point in him/her staying with you. Now, this isn't to say that you should stay in this situation indefinitely. If your ex has shown you that he/she doesn't want to be with you then you should start looking for another apartment or house before things get worse. The main thing is that you shouldn't let your ex control your life. If they can't stand the sight of you then don't give them the power by letting yourself be forced into staying with them. Even if you think that you need them to feel safe, it's not good enough. You should be able to face the world alone without relying on your ex for support.