"It was just lack of trust that created lots of misunderstandings."
Having an eye on the positive aspect of Vansh's love, he never ever wanted Riddhima to come close to anyone else because his love was still pure while holding the gun.
It means that Vansh was the one in the car, in the washroom while taking shower and so on, "Why were you doing that?"
He asked, "Aren't you worried about Ishaan?"
He was not telling everything to Riddhima so easily. He was just raising questions, "Why? Don't interfere in my life."
Shs gave a very good answer by returning his words back to him, "Oh.....So, his love has actually made you strong enough!"
Riddhima's weakness actually made her strong now, "Yes and there is no doubt in it."
Vansh was doing the same as first Maahi and Ishaan were doing, "What if his love is also a game? How can you trust him so blindly?"