same question as the others, what's making you want to repeat?
And also, did you mean being accepted by the school or being accepted (socially etc) by the other students
I am a year (or two, depending on the other person's age XD) older than the rest of my year level, with a few exceptions--there is one person exactly 10 days older than I am, and there are two girls who are younger than everyone else (ie. one of my best friends, who is almost exactly 3 years younger than me haha)
But I'm probably not a good example because for the people at my school it's more like I started older, rather than repeated--I came to Australia towards the end of year 7 and most people simply didn't know I was older.
The good example I know of would be this girl who was in the year level above me, but then due to personal issues (she used to suffer severe stress etc), she had it arranged (before VCE even started) that she would do all her year twelve subjects over two years.
Friendship wise, she came into my year 11 Literature class, and my little group of friends basically adopted her after that

and she is fine with everyone else too.
So basically you can repeat or make other kinds of personalised arrangements, as long as your school allows you to. Like the teachers at my school always used to say over and over again, just communicate, communicate, communicate and they will see what they can do.
In fact, I think the teachers and the school were the ones to start the arrangement with my friend (yeah, my school isn't that big and teachers do get to know their students pretty well, I don't know much about your situation)
However if I were you I would really consider everything well befriend deciding to repeat--you will have to spend another year of your life at school, while your other friends are moving on to something else, you'll have to go through the whole year twelve process again, etc etc.
Ultimately the decision is yours, and whatever you end up choosing, just enjoy!
