AITA for cutting ties with my manipulative family

So 5 months ago I started dating my boyfriend he is divorced and has kid age 13 and his age is 33. I am 21 years old and I know on first it seems like a huge age gap but after all explaining I do you'll see. We knew each other for a year before starting dating we were friends at that time, he would travel for hours just to see me for a short time, he would sometimes take me to work, he would be there for me. Anyways fast forward to now he buys me flowers all the time, treats me with respect and dignity, we have lot of things in common, we love reading together, he supports my hobbies, also you can see his eyes sparkle whenever he sees me. I have amazing relationship with his son he accepted me fast. Now that I have explained that part, let's go onto my family. So They don't support me at all me or my relationship because he has a kid and they think he has already fucked up his life. Mom stopped talking to me from the moment we started dating and she just keeps making my life miserable like always. All this years I lived with my family they just used me and manipulated me I was always helpful to them always giving them money sometimes it would me half of my pay, they made me pay everything even at a younger age 15,16 when I got my first summer job lot of the money I made went to them. Later on when I was of age the made me pay for any little thing as little as driving me to work sometimes and they made me pay a lot like I wasn't even their daughter. They always celebrated my younger brothers birthdays with cake. I never had a cake in my 18 years because they never had money at that time but for them they had. Whatever they did was always okay and me if I did something they didn't like I was the worst daughter. Mom would always manipulate me for everything whoever I dated was never good for her I needed to choose someone who she approves of or nothing. I always listened to them and followed their rules out of respect for them. Because I needed to show my younger brothers the right way. Now that that is out of the way let's go on my current situation. So I moved out from them and moved in with my boyfriend and he would fo nothing but support me, even when they talked the worse about him he would respect my parents. As I moved in with my boyfriend my mom would try to break us off through my brothers and my dad. But when she didn't manage to she would tell my dad what to ask me when he calls because she didn't want to talk to me. I tried multiplr times to apologize for choosing who I love over her for the first time in my life putting me first not her. But she wouldn't listen. Whenever I would visit them she would talk bad things about us and it would made me cry every time. Dad was atleast a bit supportive because I was important to him as a person not who I date. But even he managed to dissappoint me at the end. In this 5 months I would be always to call my dad first he would never call me sometimes I would wait for a week just to see if he would call but he never did. My brothers would call me from time to time but I would be first to call them most times. My middle brother accepted our relationship when he heard because he knew he was a good man. But after I stopped sending him money when he was struggling which was every month and I gave him my car he was in debt with me atleast 1000 euros. Here in Croatia minimum wage is 780euros, just so you can connect the dots. I need to work whole month for that money. He is still in debt with me 1000euros. And he wanted me to give him more money. When I said it was enough of me helping him, he is 18. He stopped contacting me that much. Younger brother 16 he never accepted our relationship. So after I stopped living with my parents and giving them money they cut me off. And they say it's not about the money what will people say like I live for other people they don't pay my bills. Anyways after 5 months no contact my mom contacted me yesterday to tell me off how I go to other people houses in the neighborhood and I wouldn't visit my dad which isn't true at all I visit him almost every week. I never call him I call him atleast every week he never calls me he has hands too if he wants to hear me he can call me. That I am embarrasing them that his child would never like me which is a lie because we play uno every weekend and cook and all the things. That I spread lies about them, I would never out of respect for them tell anything bad about them even if they hurt me. So that is a lie. She is telling me I am with a married man, he was divorced long time ago so I am not. She is telling me that I chose my family that they are disowning me and that she wants mi to die. I just said thank you mom. She also told me to never go back home to visit them ( I have all my documents there, lot of my things but if that means I am finally at peace let it be) , and she hangs up after so manny insults to me that I never helped them, they used up my drivers licence money that my aunt sent me and I never said a word I needed to pay it on my own. So yeah that was the end or so I thought. Later on calls me my middle brother, hey I am im hometown can you go out today to sign some papers I said what papers for the house because they put one house on my name. Ofcourse they don't care how I am they want to have that house and it's fine with me that house is hell I don't want it anyway. They are scared I might sell that house so they want brothers to be written on it too. I am not them so I wouldn't do it but fine. I don't live for money like they do,.yes my boyfriend has his own bussiness but I am not with him for money I work too and I don't care about money like my family and what will people say. So please tell me if I am in the wrong here and if you want to know a bit more. AITA for leaving my family