fate? predestination? certain are predestined like birth and death, the rest are our own decisions and paths in life although Allah mian does guide us in those as well.
pata nahin meray baray main kia likha hay ........kis say shadi ho ge meri............if one of u goes to the heavens plz mail me whom i m goingt obe married...........shadi nahin ho ab tak
i dunno any reference about any proof for who will one marry (but is written for sure).. but when one will die is absolutely written and dozens of aayaat are there to quote..
believing in fate is one of the seven things in "Imaan-e-Mufassil" ...
ALLAh is Aleem and Khabeer... HE knows everything and has written it already... but He has written it based on HIS ultimate knowledge.. it will happen because of our own struggle, faults etc NOT that because ALLAH wrote it that's why it will happen that way...
we are advised not to think deeply in these matters as shaitaan misguides us by putting confusing thoughts on such matters in our mind which are basically out of human comprehension...
I think this is a tricky question. What your friend say is not entirely true but not entirely fals. There is certain limits and variable that you are able to change and there are bigger variable that we human cannot change. These unchanged parameter and factors are in the hands of Allah swt.