For some background, I (23M) have a cousin sister (33F) and brother/ her younger brother (29M). Growing up, it's clear my cousin has shown favoritism for her brother, which I really never cared out.

She always made sure to show a facade that how she viewed her bio brother and me the same, though actions spoke differently.

Now, a few days back...My sister along with a friend, her husband and my brother went to a trip to the mountains, which I was conveniently not invited to (I could least care)

But my mother decided to ask her sister, a.k.a my cousin's mother why I wasn't invited, to both of our shocks, apparently my sister said something like "He's anti social, and would get bored here"

I went livid, to say the Least, so I decided to call my sister up and asked her what she meant by this, she obviously tried to deny, then said she didn't mean it like that.

Then I told them, "You're calling me an anti social? That's quite wrong, I am quite social, just not with you, you can show favoritism and I could least care, but do not try and spin it like it's somehow my fault"

I cut the call and thought that to be the end of it, now my cousin brother, her husband and everyone else in my family says I am the AH for "ruining their trip"

AITAH?