While they sit there and wait josh remembers the love and happiness he had with that one girl and how she could make him smile anytime she wanted to,This is what gave josh the drive and confidence to not only save the one he loves but harm hundred's of innocent people because all that mattered was her.
Rescue from without
Im sorry josh / Its ok i love you taylor
Taylor arrives from work while going to check her mail and grab laundry from the second floor josh lights it on fire while everyone is rushing to safety jonas is callin 911 and josh dashes through the smoke and finds taylor and saves her.
Im sorry for my actions it was for taylor.
As josh looks back on all the pain and suffering he went through to get here he dosent want to go back to the real world and the fact that taylor will only show affection to him for so long after he saved her life and start mourning on the loss of her boyfriend and josh dosent want to go back to all the pain and wants to stay in this moment forever.
Now that reality hits josh he is saddened and now taylor feel bad for leaving him and feels like she owes him love and affection and he helps her get through the hard times as she supports him and picks him back up for all the hate she put him through.
Now that taylor and josh are back together he gains wisdom and feels powerful and more confident but saddened at the same time for what he had to do to get to this moment of happiness.