I've known a woman for 4ish years now, we worked together and clicked straight away and don't work together anymore but are still good friends.
We do have different groups of close friends.
Whenever I asked her to do something, cinema, dinner, drinks she agrees and then says oh I'll ask A and B to come too. Now I do like her friends, and we get on but we wouldn't see each other or chat if I wasn't friends with their friend.
It doesn't bother me generally especially if it's a night out but now it's literally to everything. I arranged a cinema trip, she invited her other friends. We bought our tickets and then one of her friends insisted we go to this bar for a drink and then said it doesn't matter if we miss the film because it's only a couple of pounds. I'd driven too so I couldn't drink and I find it to be quite boring being surrounded by drunk people being the only sober one.
We did eventually get to the film and had to sit on the front row and they complained about how shit the seats were 
Then when they organise something they never invite me. I don't expect to be invited out all the time but on the odd occasion like when they are going out for drinks it would be nice.
Aibu to be annoyed at this situation?