My boyfriend's friends don't don't to get to know me.

So, this is my first time ever doing this and not sure how to make sense of all of this.

My boyfriend and I have been dating for almost a year and a half. To me it's very important to get to know the people in his life, family given and chosen including his friends.

While i have tried everything to even adding them to social medias and tried to be nice and friendly, I feel like i am being iced out. No matter what I do. I have expressed this to my partner and nothing ever changes. He says he has encouraged them to add me since this is the only way i have as of right now to get to know them, yet nobody does. I used to be the one always making the first attempts and was never reciprocated.

This makes me feel incredibly hurt, jealous and unwanted. Specially since his ex is still friends with everyone as they both, my boyfriend and his ex, are the center of all of his friends group. They also have known each other since they were teen/young adults. It feels like I'm not worthy to get to know, and I feel very insecure and like I am the issue even though I've never done anything. I'm from a different country/culture than him and in my brain there's a part of me that thinks it's because of this that they might not like me.

Seeing how they all are with each other, how they support and include other friends/partners makes me feel like a joke. Like there's something that everyone knows and I don't. Logically I know there's nothing that they can say, about me to make others not try with me.

I don't know how else to express this, I don't want to be a burden to him (He says I'm not, but you know what I mean); but this feeling is consuming me.

I'm sorry for the long post. Thank you for reading.