I think it's important to look at other mums and learn from them.
Take mental notes of what they do and how they cherish their kids. How they make a happy family.
It's important too to have older women in your life who can mother you.
My aunties have said to me not to mind my mum as "she's always been weird" and that little comment meant to world to me as they saw her as the oddity too.
It's difficult to explain to others how you'd really rather not have a relationship with someone as fundamental as your own mother, and there's a huge amount of guilt and risk involved with saying: "we don't have a good relationship". There's an unasked question about what you did to have a bad relationship.
Without that essential trusting relationship, I've had to learn to trust and to accept that I'm not going to be betrayed as she betrayed me. I've had to be my own mother, and look for lots of help, by watching and learning, to be a good mother to my dcs.
My MIL is superb, and she's been there for me too. I know I'm lucky. My dad's qualities of being engaged, curious and friendly have stood me in good stead.
According to my mother, I'm a total failure and she's furiously jealous and super critical if I have anything she does not have or couldn't get. She's bitter and twisted, but you'd think she was the best mum in the world by the way she crows to her acquaintances. She has an all consuming eating disorder which she projects onto everyone and always tries to get everyone to eat puddings etc, so she's 'the best' by denying herself. It's textbook stuff really. I think she has some kind of munchusens' syndrome.
My dcs have no time for her interestingly enough. They smell a rat.
I encourage them to listen to what she says and watch what she does, and they've made up their own minds that she's bad news. I don't try and make them have a relationship with her.
Thanks for your kind words
they mean a lot actually. It's nice to know we're not alone, and that we are all just doing our best. 
I thank the heavens that my dad was kind and gentle and that he loved me and told me he was proud of me. It taught me I was loveable and competent and to concentrate on the good in my life and not to spend too much time on the vampires because it's a waste of time
I'm much much happier when I'm very very LC with my mum. My DH supports me tremendously.
I wouldn't feel right in myself going NC, so LC it is. We'll see. 