@HatRack just re-reading the start of this thread and I missed that you're doing a Phd in economics and politics, is that right?! wow.
And you have three children and you're getting married and trying to keep a relationship alive (and exciting, and that's your responsibility!?)
You haven't a minute left over and so you haven't had time to think about your sense of yourself and to dialogue with yourself. I was unemployed and on benefits at 37 so I had time to dialogue myself out of this slump. Or this transition from one phase to the next.
I think your feelings are normal, there is a lot of pressure on women and yes, it's a youth-obsessed patriarchy so it takes WORK to see things through our own lens not the default lens but it's possible. And it makes you so much happier.
At 37 I had just left a dickhead and I had two children and I was single. I knew that no man who'd be interested in me (a broke, unemployed single parent of two tots) would not be the sort of man it would be wise to get involved with.
At 37, you're still young, but..... forty is looming and your subconscious is telling you to adjust your identity. You need a stronger sense of yourself and you need to adjust your identity in time for the milestone that's coming. This will bring you more peace and contentment than your goal of being thin so that you're not ashamed.
Ross Rosenberg author of the human magnet says that fear of being alone is what needs to be conquered first. Building up a stronger sense of your self helps.
some clips about being comfortable being alone I know you're getting married and have three kids so it probably feels too foreign right now. But if you're comfortable
You are probably so busy working on your phd that you haven't had time in your thirties to read the sort of material that would have prepared you for this cusp that you're teetering on the precipice of now.
Squeeze in some time to do the things you used to love when you were between 8&14.
Also, basic, I go back to this from time to time, it's a really good philosophy to tune back in to yourself when you dip
I enjoyed ''The courage to be disliked'' by two japanese writers (can't remember names) but wow that book was amazing. And I think the style, and adlerian dialogue with a philosopher is a useful way of talking yourself out of slumps and troughs and dips as you go through life.
Once you start looking for the type of wisdom that will prepare you for having a different identity, there is so much out there.