Well this is what I was going to post:
"My advice is not to look 30 or 50 years ahead, but rather to focus on today, tomorrow, this week. Are you OK (i.e. safe) and respected, and honest with each other? Do you share similar values? If so, what can you do, in a positive way, to increase and build on those feelings? A real shared project between you and your dh, or something that captures your imagination and delights you both, something that brings an energy and purpose into your lives."
But then I read your post about your "mild flirtation", and my post would be:
"My advice is not to look 30 or 50 years ahead, but rather to focus on today, tomorrow, this week. Are you OK (i.e. safe) and respected, and honest with each other? Do you share similar values? If so, what can you do, in a positive way, to increase and build on those feelings? A real shared project between you and your dh, or something that captures your imagination and delights you both, something that brings an energy and purpose into your lives."
Yes. Same advice for both scenarios. Because working honesty and together on something is the opportunity for you both to see whether you can rekindle the excitement of your love. And I disagree about 'dulldom'. It's pretty mindblowing to realise that your roots are entwined (although ime that doesn't happen quite so quickly if you keep digging them up for a quick peek!)