I won't have any friends in sixth form.

After finishing my GCSEs I'm going into the sixth form at my school. I have a very small friend group if you can even call it that (4 people me included) and none of them are going into sixth form, it's not just because they don't want to but they probably won't pass enough GCSEs for it even if they did so I can say definitevely that I won't have any friends in sixth form. I also most likely won't be able to find new friends in people coming to the school as my brother has told me that there are only like 10 new people each year and they all fall into big friend groups, other people in my year aren't an option either for various reasons. Am I alone in this and will I really be left friendless?

After finishing my GCSEs I'm going into the sixth form at my school. I have a very small friend group if you can even call it that (4 people me included) and none of them are going into sixth form, it's not just because they don't want to but they probably won't pass enough GCSEs for it even if they did so I can say definitevely that I won't have any friends in sixth form. I also most likely won't be able to find new friends in people coming to the school as my brother has told me that there are only like 10 new people each year and they all fall into big friend groups, other people in my year aren't an option either for various reasons. Am I alone in this and will I really be left friendless?

After finishing my GCSEs I'm going into the sixth form at my school. I have a very small friend group if you can even call it that (4 people me included) and none of them are going into sixth form, it's not just because they don't want to but they probably won't pass enough GCSEs for it even if they did so I can say definitevely that I won't have any friends in sixth form. I also most likely won't be able to find new friends in people coming to the school as my brother has told me that there are only like 10 new people each year and they all fall into big friend groups, other people in my year aren't an option either for various reasons. Am I alone in this and will I really be left friendless?

Only 10 new people per year, this seems incredibly unrealistic as these people will be split into many different classes and would leave practically one-on-one tutoring, which would be strange!?
Is that per class or for the whole of Yr 12, you may want to confirm this.
Have you applied to more than one school?
Most sixth forms and colleges have induction days in July, are you attending.
Most sixth forms and colleges publish their results, check this as it wil show you the total entries of the school, which will show you the rough amount of people in Yr 13 and Yr12 will be similar.

After finishing my GCSEs I'm going into the sixth form at my school. I have a very small friend group if you can even call it that (4 people me included) and none of them are going into sixth form, it's not just because they don't want to but they probably won't pass enough GCSEs for it even if they did so I can say definitevely that I won't have any friends in sixth form. I also most likely won't be able to find new friends in people coming to the school as my brother has told me that there are only like 10 new people each year and they all fall into big friend groups, other people in my year aren't an option either for various reasons. Am I alone in this and will I really be left friendless?

Im sure there is more than 10 people check the website for results, then look for how many entries came from the school
There are many threads on here about making friends in and out of sixth form i recommend you check them out