northeast I posted at the beginning of this thread earlier this morning and hadn't by then read the updates about your Mum, for which I'm very sorry, or about the fact that your partner had never parented his child with you.
I didn't say earlier, but want to share with you now so you know how I really understand what you're going through and how you're feeling- my partner did this to me almost 10 years ago.
He didn't come home from work on evening and didn't contact me for 2 weeks saying he needed space and time to figure out what he wanted.
He'd walked out on his 10 month old daughter and 8 year old stepson.
I was absolutely devastated. I can still remember now how detached from reality I felt. I felt like I was trapped in a nightmare.
I had severe post natal depression after a traumatic birth and with this added on top I felt like I was suffocating in a thick, grey fog.
I had panic attacks and became extremely ill.
My ex sounds like yours- he blamed everything on me, he told me I was a crap parent, he said part of the reason he left was because I didn't get up quickly enough in the night when our daughter was crying and it kept him awake (I'd had an emergency caesarean and infection in the wound)
He didn't do any parenting alone and also didn't pay any maintenance for months after he'd gone.
He was a complete Mummy's boy, couldn't/wouldn't cook, would rather play computer games than change his daughter's nappy or do anything to make my life easier considering I'd had a c- section.
My disabled 8 year old was more of a help to me than this man child was and it was he who would crawl across the floor to fetch me nappies so I didn't have to move around too much- all this whilst my useless ex sat playing games, oblivious.
I'm ashamed to admit that I begged this ridiculous man child to return. I, like you, listened to the blame and criticism he heaped upon me and took it to heart,
Now, I see my ex for what he is. A pathetic man child and a hopeless father.
He will never grow up and will never be a decent human being.
Some men just feel they can opt out of family life and walk away.
You can parent on your own.
I became so much stronger as a person and spent years as a single mum- and you know what!? I loved it! There are a hell of a lot of positives to it. I felt free and I forced myself to try different things and have new experiences and make new friends.
You are strong and you can be strong for your children- you have no choice but to be- they need you. Take comfort from them- you are number one to them and the most important person in their whole life.
Please seek support from your GP- I know you have been already, but your situation has changed now. Also see if he can signpost you to other support networks which may be able to provide advice and support.
Please seek help from your father also. You need family support at this difficult time. Take care of yourself and look after yourself.