I'm going through this at the moment. What makes it worse is that we work together. We weren't an item for all that long in the grand scheme of things, but we were best friends, lovers, and for a time, we were absolutely everything to each other.
He had a horrific childhood and I'm almost certain he has undiagnosed PTSD - all the hallmarks are there (I have my own, often very problematic mental health issues). He suffers with depression too, overthinks and gets stressed easily. He throws everything into work, which he always said gave him the structure and the control (particularly over himself) that he so desperately craves.
When he met me, he said I brought chaos into his life and he didn't know how to handle it. He'd swing from adoring me and wanting me with absolute passion, to pushing me away and telling me he couldn't do it. He kept coming back, we grew closer each time. I was the first woman he'd been in love with for over 20 years.
Then we both went through a very stressful time, independently of each other. We've always felt each other's pain acutely, and this seemed to be the death blow. He distanced himself entirely from me, his only explanation (when asked) being that our reactions to things made each other difficult to handle, and that he very often struggled to cope with it. I've always been patient and understanding with his mental struggles, which he was always so grateful for, so for him to just walk away so coldly has absolutely destroyed me.
Seeing him at work is agony. He's laughing and joking and being the life and soul, like he always is at work, but whenever he has to be involved with me there, his eyes are guarded, his smile - which was always so genuine for me - is now the standard plastic, teeth baring grin.
It's awful. My heart is shattered. I'm trying so hard to put on a brave face and be my own usual self at work, but it's absolute torture. Like you, Depressed, I always lit up like a bloody bonfire around him. Everyone said how perfect we were together. Clearly, we weren't, at least not to him.
I don't think I'll ever get over losing him. He was part of me. I now question all the things he said to me - were the intimacies lies? Were we TOO alike? Or did he just wake up one day and realised he'd fallen out of love with me?
Sorry for the essay. I really, really feel for you 