Ladies I have a question so Thursday the 11th is my birthday. And my fiancé brothers gf wants to buy…

Ladies I have a question so Thursday the 11th is my birthday. And my fiancé brothers gf wants to buy me my cake and we decides to make a lil barbeque. But my fiancé wants to invite all his friends since we just moved into our house. But I don't want that because I know he'll start drinking and not pay any attention to me and it's my day. Am I wrong or boring for not wanting anyone to come for it just to be me him,his brother and gf my kids? Idk sometimes I feel like an extremely boring person. I'm not a very social person. I get nervous around a lot of ppl And besides their his friends not mine so why should they have to come right.what do y'all think?