Help plzzzzzz

Guyz I have missed some episodes before leap...Cn anyone tell me what exactly happened with ruhi...I have seen that Nidhi telling her that her Ishima choose Piu... And somewhere read that it's actually Raman who decided to give ruhi to nidhi...M soo confused on whose decision was it to give away ruhi...And y is ACP shown as drunkard... Is it bcoz of Mihika or does he has anything to do with Ishra separation as Raman told him that itz coz of divek that be lost his daughter...