YOU SAID:

I went to the store to get some doughnuts with my friends robby and nate

INTO JAPANESE

友達のロビーと一緒にドーナツを買いに店に行って、ネイト

BACK INTO ENGLISH

I went to the store to buy donuts with my friend's lobby and Nate

INTO JAPANESE

友達のロビーとネイトと一緒にドーナツを買いに店に行った

BACK INTO ENGLISH

I went to the store to buy donuts with my friend's lobby and Nate