i'm doing an away subi in gen surgery. the grade and LOR in the subi is real important for those applying for gen surg. the chief resident is the person who grades the subi and gives feedback to the attending for a LOR. but the chief resident is totally asocial. when i introduced myself on the first day as the subi he just nodded and said "Ok". that was it. no hello, no welcome, nothing. a few days ago i asked him if i could scrub in with him on a case later that morning and his response was "i guess if you want to". on rounds he doesn't ask me any questions about the patients i'm following and the couple times i've tried to present to him he ended up cutting me off within the first 15 seconds and asking the intern things about the patient before moving on to the next patient without letting me continue. at first i thought he was this way towards just me but the other residents tell me he's like that with everyone even the other residents. for example when we eat lunch in the cafeteria we all sit together (residents and med students) but he goes and sits by himself at another table, sometimes walking past all us with his lunch to an empty table on the other side of the room. he's not a mean guy or anything like that, he's just totally uninterested in interacting with med students and his fellow residents. the problem is this guy will be grading me at the end and his eval is what the attending will base his LOR on. any advice on what else i can do?