Ugh! i'm getting too fustrated with this...?

well I can't take it. I was taking a PSAT today and it ended at 11 and I came home at 1 and I get home my grandma asks what time school and ended and I told her 11 and she got mad because I came home now because it usually takes me only 1 hour to get home and I came after 2 hours. she asked where I was and I told her I went with my friends to eat at mcDonalds and she got mad because she doesn't want me having friends. What do I do? I live with my aunt and if my grandma gets mad she usually gets mad. I want to have friends i'm in the 11th grade. I feel so lonely