UPDATE: From the responses, I think many of you didn't even read the original post. Please consider the context in the original post below before commenting.
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2.5 years ago, I made a friend, met that friend's SO, and introduced both of them to my SO. The 4 of us regularly hang out together, and they know that we've been together for 15 years. We then stopped living in the same city, but for a period of about 6 months in 2016, my SO again lived in the same city as the friends while I did not.
Now they're getting married, asked my SO to 1) speak in the ceremony, 2) MC the dinner, and 3) be part of the wedding party. So, I'll be by myself during the ceremony and during dinner (while SO sits at head table and also MC-ing the dinner).
I also don't know anyone else at the wedding.
I feel really hurt by the situation, and that my S.O. didn't even think twice about going along with this. Is this acceptable wedding etiquette and maybe I'm just overreacting?