My partner has a grown up daughter, and initially he assumed that I'd be coming with him to the wedding. Unfortunately his daughter had other plans. She isn't inviting her mother's partner or her father's partner (me) to the wedding on the logic that she doesn't know where to seat us.
My partner and I spend a lot of time together but he has work overseas, so we are not always together - so that ads a bit of context. It is "her day" and I guess she wants her parent's there. Not their partners sitting at the head of the table (?)
But still - it's human to feel upset and hurt at being excluded. My partner has expressed his unhappiness to his daughter about this, and we are both feeling sad that I cannot enjoy this important day with him. I will have to watch from the sidelines. The wedding is out of town, and I will not be going. So at least it feels like that puts some distance from the whole thing.
It is hard to feel happy about it. He does a lot for her, and I feel like there is no respect being shown towards me. I just want to be heard out.