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 .
What is unhealthy about it?
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