Who to invite to bachelorette party and bridal shower

Do you think it’s rude to invite a close friend or cousin to a bachelorette party if you didn’t ask them to be a bridesmaid? I wanted a small bridal party for many reasons and I asked one of my cousins to be a bridesmaid and not her younger sister. The younger cousin hasn’t made any indication she is upset but I feel guilty about it now for some reason. The younger cousin is going to be moving to a city closer to the bachelorette party and I’m wondering if I should extend an invitation to that or if it will seem rude? Same with a friend who lives in the same city as me who I think would have a good time at the bachelorette but do you think it would be awkward to be the only person at a bachelorette party who wasn’t in the bridal party?

Last question: I know you typically invite the females who are invited to the wedding to shower. Does this include out of town females or does that seem gift grabby?