I'll try and simplify it without outing myself.
Due to go away in January for 4 days to see a concert with 2 sets of couples, so 6 of us in total. Couple 1 had to drop out due to husband having to work abroad last moment. We were closer to couple 1 and have only met couple two a few times but got on well.
Couple 1 have sold their ticket to the best friends of couple 2 who we have never met before. The 4 of them are very close, bridesmaids/ best men at eachothers wedding and share childcare etc.
I really don't want to go with a new set of people, travel with them and be stuck for 4 days with people I don't know. I don't want to be stuck in the middle of what seems like their trip now plus us. I very much doubt I will have much in common with new couple plus DH is quite shy and might struggle to fit in with two men who are close.
It's an apartment with shared living and sleeping, booked activities at certain times and booked seats at said concert so no chance of DH and I 'going it alone' and avoiding them.
I hate meeting new people, I'm an antisocial person and the thought of spending 4 days with people I don't know that well is really stressing me out. We never get to go away and I was looking forward to seeing friends without pressure not joining someone else's holiday. I would never ever choose to go away with a stranger in a million years so deliberately wouldn't have gone if I had have known.
No matter what I do I risk looking like a mean person for either saying I don't want new couple to come or for saying we aren't going because someone else is coming, it feels really childish.
Do we loose the money and drop out and risk looking horrible or just suck it up 
AIBU?
To be annoyed about this ?
Greyhorses · 04/12/2017 21:09
I get really anxious around new people so I generally tend to socialise with friends I have things in common with. DH is also quite reserved and this worries me (see I'm worried about it already and way overthinking it!)
I thought I had signed up for a holiday with 4 friends of mine, not 4 people who are very close friends with us two tagging along behind. We don't have anything in common as they all have a shared interest and spend lots of time together and we don't have any interest in that at all.
I'm gutted as I did want to go but I just feel like I will be anxious and stressed the whole time and it's out a huge dampener on things to the point I would rather loose the money and not go
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