it's not that there's no turning back... they could have got
together but even so... will they be happy together?? maybe yes
maybe no...
Hao Jun (Takeshi) might be deeply in love with xiao rou, and that
is why he treasured the their friendship even though xiao rou
rejected him.
Hao Jun passed the photos back to xiao rou becoz he felt that he
should 'return' those memories to her, marking an end to their
relationship...