I'm definitely no expert, but I think if it's a recent development then you should give it time and don't make any hasty decisions.
Some days you may want to run away, other days you might feel like there's hope after all. Ideally you can figure out a way to have more hopeful days. And talking to your partner and letting each other know how you feel and where you're at with things can make a big difference.
Hang in there...