Should I say something or?

It’s not that I’m upset about it it’s just creating a weird dynamic. So I am apart of thsi big friend group. I can admit that I don’t really talk to most of them as I don't know I’m just closer to others. So we’ve been friends since high school. We’re juniors in college now. But anyway. One “friend” has planned a birthday trip. I was not invited. I didn’t think much of it because it’s her birthday and I don’t want to seem pressed. But we still all hang around each other. I honestly don’t know if I should address it. All of them are going on the trip in October. So I know we’re not friends but we in each other’s faces everyday just weird. All my other friends are going but I don't know. Just want another perspective cause I don’t want to feel like the entire group is against me or something
Should I say something or?
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