(PEOPLE.com) -- Demi Moore and Ashton Kutcher announced their split on Thursday, but tensions have been building for some time. "Ashton is unhappy; [Demi]'s unhappy," a source tells PEOPLE. "It just got to a point where they had to end it." Despite longtime problems, the exes did try to work on their relationship. Unfortunately, their issues -- which went beyond Kutcher's alleged infidelities -- couldn't be resolved. "The fighting could get pretty intense," an additional source says of Kutcher, 33, and Moore, 49. "Whatever counseling they did was fine for a quick fix but could not get to the heart of the problem." See the full article at PEOPLE.com. © 2011 People and Time Inc. All rights reserved.
A source says tensions between Ashton Kutcher and Demi Moore have been building for some time . "It just got to a point where they had to end it," the source says . "The fighting could get pretty intense," another source says .