He may dislike both Ab-Ru thinking they also abandoned him and forgot about him.
Though him disliking Ru has less chances.
Kuch toh sense ki baat boliye na. He knows ruhi k karan unko grh se jana pada tha aur he saw how she blamed his mom. He was very angry on her. G fam mei kya chuhi nhi aati hua yeh sa uske Karan hi toh why he will like a person who was blaming his mom.

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