My boyfriends family makes it impossible to get to know them

I’m not sure what I can do and I feel very over trying to get to know these people!! I’m so frustrated I finally broke down crying today.

My bf has three sisters and one brother who are all very close in age to me (I’m 23, and they are 16, 19, 22, and 25). I try to talk to them and they only give one word replies, will laugh and not say anything, or will blatantly ignore me!! My boyfriend and I fight about it all the time because he feels like I’m being dramatic and that they’re just shy, but they’re always laughing and joking with each other, but actively avoid and ignore me. They literally will speak to him in order to talk to me. Example, “Aaron, Do you and Ella want steak or chicken” or “Aaron, what do you and Ella do in your free time” (they live a couple hours from us). It’s so odd and I feel frustrated that I have pushed myself out of my comfort zone in order to try and get to know these people and they seem to not give a fuck. They invite him only for dinner, whenever I do go see them, they only talk to him or ask him questions about OUR life, and they literally will not speak to me unless I talk to them. Otherwise they just act like I’m not there.

I’ve been with my boyfriend for almost 2 years now and I still feel like every single time I go around them, there is an air of uncomfortability as if we are all meeting for the first time. I can’t imagine how I can have a serious and meaningful future with my boyfriend if my relationship with his family remains like this. We live together and they still treat me as if I’m some random person who they will never see again!! I’ve seen his mom treat cashiers and servers better than she treats me!

When I say I’ve tried everything, I mean it!!!! I had my 15 year old sister make me a list of popular tik tokers to watch and follow since my bfs siblings are constantly watching and making tik toks. I watched a cheerleading documentary so that I could try to bond with his sister who is a cheerleader. I learned how to make tortillas and other authentic Mexican food (important to his mom) when I hate cooking, and I’ve learned a lot of sign language so that I can communicate better with his brother. All of my efforts are completely lost on them and whenever I try to insert myself into their convos, it’s followed by an awkward silence or topic change.

I love my boyfriend to death and we have an AMAZING relationship, the only thing we argue about is literally his family not giving two fucks about me. He is super close with his mom and is constantly texting his siblings in a group chat so I’m unsure why they wouldn’t think it’s important to know me too. My family is very close and my mother treats him like a son! I feel so sad and do not want to end our relationship due to his families behavior which I find to be very rude and odd.

Not sure if I can try anything else or if I should just confront them about how they act since my boyfriend will not do it. What would you do in this situation?

Edit: I don’t invite myself to dinners lol. I’m saying that they only invite him and never want to see me. I only go if he asks me to go with him to see them or if he invites them to our place. I would never force myself into a home that I wasn’t invited to in the first place.