I (19nb) had to go to Ukraine with my mom and stepdad because my grandma passed away, and of course my grandfather is grieving. I truly didnt want to go anyway because I wasnt really sad about her passing, and I dont think im responsible to help anyone grieve through this. Im also not particularly close with either grandparent. decided to hold my tongue because I still live with my parents, and the arguement that wouldve ensued because of me saying I didnt want to go would have an 80% chance of resulting in me being kicked out.

So I went with them and wasnt too happy and pretty nervous since im entering a warzone by coming here (we were in Lviv which fortunately isnt as likely to get struck but still, pretty nerve-wracking). I didnt make it look like I was upset, I went along with everything. Even agreeing to my parents demands to engage with my grandpa as much as possible to keep his mind off of it.

Today is one day after the funeral, and we all went out to eat to treat my grandpa to something nice. Unfortunately, he sort of has a drinking problem. He ended up getting extremely drunk and I had to leave early with him to get him home. Being around drunk people is already a trigger for me, but to be in an uber with him and hear him sobbing saying that he doesnt want to live because his wife is dead was extremely upsetting. I didnt say anything of course because I just wanted to avoid the arguement.

After I got home I had to sit and listen to him breakdown and it was extremely uncomfortable. I texted my mom after telling her I was extremly upset by this and was told that "I should know better" and to essentially deal with it. I felt kind of bad because maybe Im not doing enough, but at the same time I dont think I should have to be the one dealing with this. AITA?

EDIT: I need to clarify here that I am not blaming or upset at my grandpa for grieving. Its only natural that this would happen. I got him home, listened and comforted him and put him to bed. Afterwards I told my mother that I was upset. I am solely upset that this much responsibility is being put on me. Hes my moms father, it shouldve been her responsibility to handle this, not mine.