Hey... you're gonna loose friends and make them throughout your life.
I have a friend who I've been mates with for years and then come sixthfrom we grew apart a lot but still talked on and off, I met new friends who are the best people I know. Also my best mate ever, since primary school, left London for sommerset that year too lol. Basically what I'm saying is, try and make up with them but if you cant, it might just be cuz youre all growing up in to diff people. You will find new friends. It sucks to think about it but its true.