You are the 2nd dev I have come across in the past little while who thought it was a cute trick to have the main girl leave for a job, cease contact, and then after the mc has decided she is not coming back, and that he must move on with his life, poof here she is again, hoping that things will be like they were.
In this case, even though the mc decided that he will not delete her pics from his phone, and he knows that somewhere inside, he still grieves for her, he feels reluctant to take her back. In neither case, is it clear that he will. Sure, fodder for drama.
Oh, shoot, is it ok if I wish for a better plot twist? In both cases, irl, the girl would know that she must make more of an effort to not loose touch. Send him a Western Union message or some damn thing. At least. Then, if he fools around, it is on him.
Oh, alright, I'll play the game.