Who should go ?

My boyfriend is in the army and is graduating from basic training in a few weeks. we’ve been together for 3 years and he was my best friend for many years before that. i told him i would support him through all of this and i have. he goes to AIT right after so graduation will be the one day i see him in the whole 6 months he has been/will be gone. because of covid there’s a restriction on the number of guests that can attend. He wants it to be me, his mom, and his sister who lives down south near the base. Me and his mom would have to fly out. all of a sudden everybody feels entitled to going. his brother who has never gotten along with him, his other sister who he’s not even that close to, and his father who hasn’t been in his life for years... pretty much they all want to go instead of me and it’s creating a lot of tension. i hate confrontation but i’ll be damned if i miss my bfs graduation so that they can all go. but theyre all really making me feel weird about it