What do I can't bare my boyfriends family?

I have been with my bf for 6 1/2 years and things are going really well for us we recently bought our first house together, but his family is trying to run our lives. My bf's mom and sister are both acholoics and this is something i had to get use to because I didn't come from a family where acholoh was more important then children. I have been having problems with his family since be began a good job as a conductor, all they say is that I am a gold digger and only with him for the money but I dated him for two years while he worked at kmart, and my brother in law got him the job as an conductor and yes he makes a lot of money but i work too and I am putting myself through school. They also tell him that they want a boat and jetskies and ask well when are you going to buy them, this gets old fast because we are trying to fix up our house and do things, but they also have an opinion and think what they say should go especially when they are drunk which is all the time usually. I am not a big drinker at all I would rather be sober and have fun, but they always talk about me and try to make me get drunk but this is where I stand my ground because I won't give in. They are just always telling us what we can and can't do and its getting old...the one thing that I am really writing about is how someone asked me when we were going to have children and before I could answer his mom and his sister both said never because they don't like children. I came from a huge family and everyone loves children so for his family to say I am not having children because they don't like kids is just crazy but it makes me think that my bf may not want kids because of his family but i want kids. I don't really know how to even begin this conversation with him because everytime i bring up his family he gets upset with me. I am scared that his family will make his decisions for him and I have seen it happen before were they talk him into something. My next biggest concern is that since his family is acholocis they will ruin all my big days....like my weddings, the day I have a baby, etc. My bf threw me a 23rd birthday party and his mom came wasted wasted at 6pm and it was embrassing to have my entire family ask if she was drunk already then she accused my family of stealing change out of my bf change bucket....my fam was really upset and I didn't really know what to do about any of it because its my family too. Nobody in his family sees anything wrong with what she did, it seems like I am the only one and its me against the entire family. Everytime she is around us she is wasted and I have decided that I can't have parties with both of our families because she is make a big scene, i can't even have my dream wedding because I don't want her to take my big day away from me I just don't know what to do....I am just scared that no matter what I plan she will be the center of attention and I just want one day to be about me and I don't think my bf understands where I am coming from. What do I do?