What should I do about school?

Ok so over here we finish school at 16 ( form 5 ) and when I was in form 3 I repeated and changed schools then I didnt finish the whole year and for form 4 this year I am not going !! My parents tried to send me but I didnt want to leave.My family has its own good business and I want to continue working in it !! But now I am really regretting my decision and want to continue with school and get some qualifications before I continue with the business although I can make due without them !! I am sure that if I continue I will do extremely well because now ive got the will !! But im shy from the people in returning back to school after being away for about 8 or 9 months.What should I do !!! Please help me !! Should I go and study in a country where they finish school at 17 or something ?? PLEASE HELP ME :( . Remember im supposed to be in my last year but im not coz I repeated so my last year will be next year !! Do you think I can keep up ??