Before you start looking, and when you suddenly have it, make sure that you're comfortable with the idea that you can live without it. Then you know that you can quit a toxic relationship whenever you please. A partner can feel that energy, and to them it makes you more precious Then, when you consider leaving, you might give it more chances, but NOT because your wellbeing is dependent on it, but because a person deserves it. Not talking stuff as serious as infidelity though.