I prefer the original ending :
Aku tak ingin kau lupakan, sayang.
Compared to this one, that apparently you decided to be your final version :
Aku tak ingin kau lupakan juga.
Tapi untuk apa?
The latter sounds so sad, no hope in that, while the first one is sweet. It’s as if you are really talking to me, full of hope.
The second one sounds like you are talking to the void, giving up.