"I'll plant memories like flowers in your mind." "So do I. And one day you'll see – " "You'll be the same like me." "Yes, you'll be kind." "Dream of it, you'll be as evil as me." (LV & HJG)
... and right from the beginning never meant to end.
If your life isn't anymore how you've known, whose life do you live? And if he isn't the one who you hate the most, who's he then? These were the tricky questions Hermione agonised for a long time, but now standing in front of a 17-year-old Tom M. Riddle makes it even worse and was at least the most difficult, and not –like she thought - the question of how travelling back in time.