He lost her

Vansh could bear anything but the painful thing was to see someone else' shadow with Riddhima.

Whatever Vansh did by coming back, it was just because her betrayal hit him hard, "Yeah because you have actually deceived me."

Riddhima had to be careful at that time but everything had really gone out of control, "I don't know why I fell in love with Ishaan."

Vansh said, "You didn't only fall in love with him, you began to trust him blindly and nothing hurts me more than this."

Vansh actually threatened Ishaan and convinced him by telling him that Riddhima would not stay safe until Ishaan was with him.

He was frightening Riddhima so that he could remove Ishaan from his way, "I am sorry."

Sorry wasn't going to work for this, "Do you think that a sorry would fix everything back again? You are now the wife of two."

So it also clears that Vansh never ever gave divorce to Riddhima, "Are we still bound together?"