I think that he has a very confused idea about love. He thinks, right now, that he is in love with Sarla, but I feel that it's not love--perhaps lust for her or even love for her money.
Him seeing Saroj when he was with Sarla was weird, but I think he's having this niggling feeling that he should not be hanging out with Sarla anymore since he's getting married to Saroj and that's why he remembered her. Could it be that this guy has a conscience after all ( a small one) perhaps? lolll