Task: Question Answering
Input (English): Context: He had tried so hard , he had done everything he could to save them , to repair all the cracks that had formed in their relationship through the years , but it still was n't enough . He thought that if they could overlook each other 's indiscretions , pardon all those not so innocent touches and smiles , that they could salvage what they had . But fight after fight , as they struggled with each other , against each other , Junsu slowly lost sight of what he was fighting for to begin with . It used to be like rainbows and daisies whenever they were together , but as time passed and as they grew , so did the distance between them . 
Question: What may be the reason Junsu is going over this issue in his mind at this time ?
Output (English): He is realizing they may not be able to solve their problems no matter how hard they try .