Hate his family.

So I've been with the same BF for 4 years and I really love him and I get along fine with his parents but since we are of different ethnic background I feel like his young family members hate me. I can't stand them either but my BF always sides with them and I can't take it anymore he is always trying to shove them down my throat and it's not like I have tried to be friendly cause I have but they all ignore me and make fun of me I'm not skinny and I feel that's why because they are all twigs.