"
You, I, we die
It's so hard to take
This time, I'll fly
We won't ever break
At this point the decision has been made not to stay in the relationship. 'You, I, we die' meant the end of their stage together. Then the line 'this time, I'll fly, we wont ever break' was said. This is in reference to the kite mentioned earlier which represents the happiness in the relationship. The girl had been the one who would fly the kite boosting X. He is making a promise in this line to reciprocate the love she is giving him and bringing her happiness for a change so 'we will never break'