Yes you can see the way he was shown in the end, he was thinking something It also seems he doesn't want anyone to go to Prachi so that she doesn't have hard time. It really seems Abhi too is involved otherwise I am sure he would have been heartbroken as others.
Yep nowhere has abhi displayed anger, disappointment and upset over prachi changing his statement unlike other characters. So seems prachi entrusted abhi with her plan or at least consulted but didn't think to trust her mother.