I need help in the lovesick department?

My Son's12 yr.Marriage has just ended and he's not taking it very well cries all the time and he has 2 kids 10 and 7 who needs their Father but he is so tore about his fail marriage that i don't know how to bring him back i need some help what do i say to him to comfort him,I talked to him for hours and try to say the right things and comfort him but nothing is working its just been a week since they split up.Any comforting advise out there please Thank You