Worried about birthday party

My sons birthday is this weekend. My family isn’t super close, but for the last 3 birthdays, his 3 step cousins came, and my cousin and her daughter came.

My son is autistic and very social, and I’m worried no one is going to show up. My cousin said she has to check with her bf, and my stepsister said she will have to check with the kids father. We told them they don’t have to bring gifts. Their presence is a gift enough to my son.

My dad won’t come because of his health issues. My bf isn’t even going.

The only people I know will be there is my mom, stepdad, and me.

I feel like… guilty because I don’t know a whole lot of people. I feel like a bad mom.