Where did everyone go? Ayaan? Nuzhat? Shireen?

Hi

I havent been watching Qubool Hai for a few months now for personal reasons. I watched a couple of episodes today though and I was wondering where everyone went.
Where is Ayaan? Wasn't Zoya married to him?
And what happened to Shireen?

And what about Nuzhat - i forget if that is her name - but her and Farhaan what happened?

Id appreciate if you guys could just do a quick summary for me

thanks

P.s.
Sooo happy they're married!!!