:/ help

i’m going to my boyfriends aunts wedding with him and his family soon and his sister is the flower girl and i’m pretty sure he’s in the wedding kind of maybe not he doesn’t really know. i’m his plus one and idk if i’m gonna be able to sit with him at the reception and his sisters boyfriend is going to and ik him but i wanna be with my boyfriend bc my anxiety idek. i know it’s up to the bride where everyone sits and all and i’ve never been to a big function like this. so any advice or whatever???