I dont think manav will turn negative. He is regretting every day because he lost his first baby. Right now, he is in delusion that only money matters in this world. You see he has bad relatives and counted them when they needed money. But since, they lost the baby, he changed like this. He's ambitious right now and that's okay. How long will we see manav poor and dharmesh, manju, and rasika taunt like crazy? Its about time he too flourishes in his life. Only one way to set this character right and that's to balance everything in life.