Am I too petty?

My boyfriend (M29) invited me (F28) to his birthday dinner with his family. He said his mom and sister will pay for him as a birthday treat but me and his brother and sister's bf will need to pay ourselves. Me and him will celebrate his birthday the next day separately too, and i will pay for the dinner and gift. To be honest, im a bit disappointed because I thought when he invited me to the family dinner i will not need to pay. Because if i invite him to my birthday's dinner with my parents, we will definitely not make him pay at all. His mom is working but not earning much so i dont think she can pay for the whole dinner. And the rest are just around the same age as mine. But still, am i too petty to feed disappointed?how should i feel in this case? My perspective is from an Asian country.

InOtterWords · F

All I can say is that he is being upfront with the situation and you are not the only one having to pay your way.

His mum is obviously weighing up the desire of a family get together and being able to afford the whole meal.

I think it is not too much to pay your own way for this meal, and if you feel you cannot afford it then tell your bf .