My bf didn’t invite me

So next month I’m going to be with my BF for one year. This week is his bday week and today he cancelled plans because his family was going to make him something. Ive been to a lot of family events and they know me and everything. They know we’re really serious about our relationship and that we plan on taking things further in the near future. I just feel weird that he didn’t invite me to join them. I’m just a bit upset. even the lady that rents at his house is there...and she’s nothing with him, just a random lady and I’m not there. I just feel weird. Because he always invites me and says that I’m his girl and I go where he goes, like family gatherings. And it’s also weird because I live like 3 min away. Do I tell him I’m bothered by it? Or what

Edit: I just asked him and he said he didn’t invite me because his aunt and uncle didn’t say to invite me. He said that all the other times it’s because they say to invite me...