Had two glasses of wine and sent this email to him:
The woman you first met is certainly not the woman you have today. When we met, I was bubbly, optimistic, fit, confident, attractive, playful; I was an upgrade on [ex]. Since then, I've diminished in so many ways, now any shred of remaining self-esteem is just bobbing around in the ocean, struggling to keep afloat. There are zero ways I am a better person now than when we met, and many, many ways I am worse. I look worse (stress and having a baby have aged me). I feel worse (I'm on a higher dose of antidepressant than I've ever taken in my life). My career has stalled; I have less friends; I have less hobbies; I have less money. [ex] is definitely a better catch than I am today, and it feels unjust and degrading. I'm not a good catch anymore. I am a burden and a mess. It's a struggle to carry on, and it's a struggle to be reminded of her superiority and of her being better suited to you than I am. If we are both honest, this whole relationship has been conducted in the shadow of your union with her. No holidays. No stable home. No money. She deserves your money. I understand if you feel regret in leaving her. I make her look good.
Today CPN asked me a random question: "What are you good at?" I replied "writing", because you mentioned it yesterday. She said "what else?" And I paused and thought. All I could reply was "If you asked me two years ago I could reel off a list, I used to love myself; but now, there's nothing really". I feel I've diminished in value so much that I'm so, so close to the scrap heap. Very close to being dumped at my mams. Close to sinking into nothing. Mental health is scary and elusive.
I'm sorry for who I have become. I don't know how to get better. The more I lose, the deeper into depression I slide. I've already lost most of my self-respect, and all the things mentioned above. There are very few good times anymore. No one to talk to, nothing to laugh about, nothing to look forward to. When I start talking your eyes glaze over, you look at your phone, or you change the subject. No one is thinking about me, looking forward to seeing me or wanting to spend time with me. You often remind me that my kids would be better off without me. And you're probably right - in my current state, I'm little use to them. And little use to you. [ex] has got her shit together, and is now a way more attractive prospect than I. The shred of pride I have left finds that extremely hard to swallow. Like any female, I like to be the "top" woman in my man's life. And I don't deserve that slot in your life anymore. She is better than me. Yes, she lost her PhD, but I'm very close to doing the same. It seems she shares the same parental values as you, and (as you remind me) she can cook and likes cooking for you. And your 2 friends like her. And you're not embarrassed of her. And she's skinny. And she speaks Russian. And she's [daughter]'s mother. The list goes on.
I can totally understand the need to get rid of me and go back to [ex] or otherwise find someone of a higher standard. As I said in the opening sentence of this email, I am not the woman you first met. I can honestly say I have never fallen so far from grace, in such a short space of time as I have in these past 2 years. Before we met I never had zero friends. I never had an abortion. I never had a psychiatrist! I'm a really shit catch now.
All I ask is that you help me through the PhD so I can find a job and give [our son] a reasonable standard of living. Can we at least agree to stick to the plan to enable me to achieve that? So you carry on taking [our son] for 2 hours a day (spread into 2 slots) so I can claw my mental state to par enough to satisfy my academic responsibilities, and we do the lab trips as originally planned. I will crack on with the driving lessons and do whatever it takes to get me to a standard where I can fend for myself and be an acceptable and independent mother.
What I'm saying is that, this lifestyle won't be forever. This time next year, you will be free of me and probably have an upgrade lined up - someone bubbly, confident, attractive, ambitious, playful, like I used to be. So please don't feel disheartened. Something has obviously gone very wrong with us/me in the past 2 years and I'm not pinning the blame on anyone. It is what it is. I've fallen so far in value that we are now mismatched, and you know you need to get someone better. Just let me find my life jacket before you cast me adrift. That is all I ask of you.