Relaxing when times get tough; assuming that "this too shall pass" allows you to roll with the punches. If you know things will inevitably arise to challenge you, you can be more detached when they do. Problems become worse when we dig in our heels and try to force a solution. By relaxing into whatever struggle arises, we remain flexible and open to inspiration and insight.
Even if you have a hard time letting go, you can at least observe yourself taking things very seriously, which in itself helps to detach you from the experience of anxiety. Whatever is happening now won't be happening a year from now, so just keep breathing through the situation and see if you can take things a little less seriously.
What do you need to learn from each other?