How to survive a mentally abusive children’s father ?

Hi i’m desperate the father of my children is running me to the ground… We’ve been together seven years and we have a five and a three year old they are girls and of course they love their daddy but he just keeps turning them against me associating any type of negative feeling with Mami for example it is 40° outside and they say we want to go to the pool he says we can’t because mommy doesn’t want you to or for example they say we want to go to the playground and he’s too lazy to take them instead he tells them well ..mommy doesn’t want you to go to the playground now… I am so desperate I don’t know what to do I’m a stay at home mom I quit my career when I had the second one and dedicated my whole existence to them and now not only is he the favorite parent but I am the hated one although I’m up at five every morning and in bed last every night he works he’s a millionaire he’s gone most of the time he spends about seven hours a week with them and he tells me that he will fight me to the grave for custody :((( Also he wants me gone from the house he says he will raise them with a live in nanny… We are not married he broke the engagement when I gave birth to the second one! Any advice? Thank you!