At first place shaurya was never faking his feelings that is sure...otherwise he would have atleast told it to his mom...whether it was his mission betrayal of mehak sharma in the mid of this he fell for her and he very well knew this I believe . He surely has some reason to leave her at the altar I believe it for atleast now because it is not shown to us still how he overcame the poison given by mama why he is mum in rajeev mama and mami till now .it was quite evident he was trying to create his bakwass story infront of sharmas because he just reminded them only the things that they have seen infront of their eyes and hence they easily believed his short. Now coming to shaurya today during the jogging he was clearly convincing himself that now it's over. Seeing his last love histories he clearly had lost the trust factor in love so mehak will definitely bring back that trust in love to shaaurya because she still has trust in his love that's why she is still wearing the chuda. And if I'm not wrong her upcoming act in khanna mansion will only be a mission to know the root cause of why he left her at the altar. So just calm down dear and enjoy the flow. We are really on for a roller coast ride 😉