Are u lot in denial??
Aryan was never shown as a positive character.He was always manipulative,cunning and wicked.He planned to kill Janaki(and thinks he did it),was responsible for Vaidehi's dad's death,killed some lady advocate who was out to help Vaidehi,killed the lady who got pregnant due to his brother(i forgot the loser's name).
Aryan maybe cute and all but he is shown as a thorougly despicable character.I am sure none of us would want to be saddled with an impotent monster like him as an husband .
All said I dont think either of them is going to die.Definitely not Aryan or else the story wouldnt move.