Nan has loved Phu so long and Phu never gave him an ounce of credit and now he's come back after a decade and he seems to expect that life will simply pick up where he left out and that Nan isn't hurt or upset because Nan doesn't let himself be hurt or upset and then that illusion is broken because Nan knows he was lied to and suddenly it's like a dam breaks inside him, a dam of lies and a decade of pain and a decade of loneliness and a decade of looking for the one person that mattered to him more than anyone else...
Nan literally flew to Australia to search for him, spent years sending e-mails to a person who never responded and then he finds out that the person he's been searching for this whole time has been lying to him, lied to him about leaving and then never came back and then even had his grandmother lie to Nan about where he was? He went so far and he expects nothing but forgiveness?
And now all Nan has is a broken heart and a broken friendship and ten years of his life lost and all Phu can do is cry that he didn't want things to change, that he wanted things to stay the same and that's why he left him for a decade?
Phu easily could have had a chance with Nan if he just hadn't run away and now, instead, he's destroyed a lifelong friendship and hurt Nan to the core and left him alone and aching and doubting everything he's ever thought he knew or cared about and showing me Phu watching Nan desperately worry about him with his grandmother is not helping the ending.
Phu had better start trying to make it up to him rather than run away again.