Hello, I am Rafael. Thanks for asking your question - I'm here to support you. (Information posted here is not private or confidential but public).
I am very sorry to know about this very sad and frustrating situation you experienced.
You are absolutely right whenfeeling this sad, frustrated and upset by your boyfriend's behavior.
Most people in your shoes would feel insulted by it, specially after an argument in such a special day, where he was not there to celebrate with you.
Some people would say it's not a big deal, but depending on your feelings, personality and circumstances it could really matter, and he knows you, how you feel about different things, he was aware of how the night was already undermined by the argument and chose to make such comments.
Then it is not unreasonable for you to feel this way about it. have you been dating for only a short period of time, for him to be unaware this would be hurtful to you, even when common sense shows it is not something nice to say, specially under such circumstances?