Sit back and analyze what went wrong . Think about good points about your partner . It's always easier to break than make . Take a good advice , this may act as a torch to lighten the hidden dark areas of ur mind .
It depends on lots of things, most importantly what is making it feel unhealthy...some things can be worked through. But in general unhealthy leads to unhappy.
Leave and keep hoping for a better one.
Exit stage left