Which is why the candles don't drown or get blown out... the flame only gets stronger ;)
At the tip of the of the fire the flames become one portraying that Arjun may dwell her as he wants her to be... and that's clearly shown with Maya mending her ways to attract Arjun towards her whether It be going to the tea stall or going and sitting in economy class...
Maya is willing to dwell with Arjun, but how Arjun will help her change is what needs to be seen...
it's all based on perception
You can take something like the flames burning as one in a positive way
Or take it in a negative way by saying that one flame burned the other
But at the end both flames combine with each other in each other's fire showing that they were meant to combine. ;)
Please comment and let me know your thoughts :)