In-laws always disliked me and its been 5 years, leave my bf or accept it, he sides with me and knows im a goo?

Been with my bf for over 5 years, we have an almost 3 yr old and I have an 8 yr old, they have always disliked me from the beginning, well only the mother but now siblings as well, I took their baby away from them and made him grow up and not depend on mommy, anyways, this last time was the final straw, I have been accused of manipulating him, taking advantage of him, trapping him by my pregnancy and using him. I do not sk him for any money, I pay my things and what we own jointly we split down the middle, but they think its all money, they tell him he is so blind in love does not see it. THat I should only take care of OUR daughter and not him, since I birthed her and apparently what I do with my money is their business. I know I am with him but I have had it, he sides with me and defends me and tells them I dont do these things but nothing, he is 27 and I am almost 30. He tells me I am with him and not them, but this emotional abuse is killing me, I have told him, our daughter is forbidden to see them ever again, and oh yeah, my oldest daughter is not his so why should he care for her or love her, saying things about my kids killed me even more, so I decided to just leave him to make it better, but he tells me then that I dont love him, I do and thats why I am doing it, so it will stop. If I leave him then obviously they won the battle and if I stay I will always here it somehow or he will hear it from them one way or another. Need more adivce, oh and my mom says nothing negative about him even though there has been issues in the past they he has done to me.