Anybody having relationships problems....

[Stuck2008]

Please bare with me as I go through my story.

I have been dating my bf for over three years. We also live together and he dated his ex for around 10 years (never married). His ex also has a son..(not my bf's son).His ex also has a sister with a son. The boys are both now in their teens. My boyfriends mom is infatuated with his ex's son and both boys have come over for many dinners to our house as my boyfriend said to me that even though they are not together anymore (shes apparently an alcholic) he still wants to have the boy around in his life. I am having a really hard time dealing with his family constantly always wanting his old life though. His mom has called our house leaving a message for his ex and has called me her name a few times. If I try talking to my boyfriend about it..we argue and I look like the bad person. His mom has invited me to parties and the ex's sister shows up with all her friends. As a matter of fact,he is over at his ex's sisters house right now with his parents having dinner. I asked him why he is going and he said "he is going for the boy's sake cause he asked him. He asked me to go like I am suppose to say yes after we have argued so many times about this issue.He is a good guy but he does not ever stick up for us to his family. He will say well I can't tell my parents (he is an only child) who they can and can't hang out withm I am not the jealous type I just don't feel respected, It feels like he is divorced with children but he does not have any and was never married. I have always gotten along with all of my boyfriends parents and it feels like they are breaking us up. I am in my early 30irties and want to get married and have children soon but his family is honestly still in love with everybody from his past and they barely know i exist. He says oh no my parents love you but you know how you just get that feeling like your not good enough for "their son." My bf and I never fight except for when his ex and his ex's sister come into the picture. I am quite upset at this point and I was wondering if there is anybody out there going through the same thing or have and what they did?