Your Significant other got invited to the wedding but not you. What would you do?

If Your boyfriend you've been dating for 2 years you live together, you bought a house together and you're on the verge of getting married. Got invited to a wedding and he's not allowed to bring a date. He's not really good friends with the person anyway. Would you be mad?
If you are the person being invited to the wedding would you go without your girlfriend? I personally wouldn't
Your Significant other got invited to the wedding but not you. What would you do?
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