He knew tina played with him big time and the way he was laughing at tina, ridiculing her explanations, xallkng her nautanki n all, I don't think he will go back to tina and be normal like before, especially not after listening tina spewing poison against him and also his friendship with sumbul in front of salman. Instead of defending her best friend she actually took stand against shalin when he was being brutally bashed. Not once did she try to pacify him. It made him even cry but tina kept going on n on...
There is no way a shalin could've forgiven tina in such a short time just because he got dressing down from salman
He didn't look convinced with salman's Abba Jabba explanations kne bit and looked frustrated because he wasnt allowed to put his POV...so for him to go back to tina in a heartbeat seems fishy.
My guess is he was smart enough to realize what salman and makers wanted from him and took u turn on his stand agaist his own conviction and went back to her just to please them momentarily.
Baaki toh time will tell...