Definition: Given a real-life anecdote of a complex ethical situation, generate a suitable title that describes the main event/root cause of the situation. Imagine that the given text is a social media post, and you have to write the title of the post, so the users can decide to read the main text or not.
Input: Hello, everyone. I have a strong inkling ITA, but needed to confirm, so please lay it out honestly.  

For the past couple weeks, a few friends and I have been planning a 2 week vacation overseas later this year. The group originally included, myself, my gf, and my friends Don and Michael. The four of us have been good friends for years now.

Now Michael has been dating this girl, Melanie, for about a year and some change. We all like Melanie enough, she’s a nice person, and treats everyone respectfully. However, it’s been unanimously decided amongst not just us 3, but the entire friend group that Melanie is just *okay.* 

While she is a nice person, we have very different senses of humor, demeanor, and perspective. 

That being said, we all still go out together, hang out together, and Michael brings Melanie to almost all of our functions and events, which is completely fine.

However, Michael asked today if Melanie could join us on our vacation. Obviously we all said yes, as she’s his gf and we all felt he was entitled to bring her. On top of that, my gf is also going, so how could I object. However, no one was exactly ecstatic about the situation.

My question is AITA for having negative feelings about Michael bringing his gf along with us on our 2 week vacation?

My thinking was that if I was spending a lot of money and going through the inevitable overseas travel pains and stresses, I’d like to do so with the friends I originally planned with. I feel that Melanie will be a little bit of a downer, and I would like to avoid being in exasperating situations with her if possible, especially on a long trip. Am I the asshole here?

having not wanting my friend's gf to go on a long vacation with us