Can't go to family meeting on Easter

[NadaTeTurbe]

My family is atheist and I'm catholic. For easter sunday, we're having family meal at my grandmother house, with my whole family. But if I go with them, it means I can't go to mass, so I told them I won't go and now they're angry at me. I stuggling with a lot of feelings, I feel guilty because I'm not going with them to my grandmother house. I feel angry at them because it's not the first time they want me to miss a "big" mass to go to a family meeting. And I'm jealous of other catholic family who go to mass together while I have to go alone. And I'm doubting it's "worth it" to go to Easter Mass. Please pray for me.