Yes, Sharanya deewangi for shiv it is.
Why am saying this is because as much Shiv loves Sharanya she loves him more than him. It was her only who gave him every right who was possessive about her!
In friday episode we saw Sharanya saying to Shiv in fb 'Mai srf tumhari hun meri har sans meri har dhadkan srf tumhari hai' words may not be exact but they were this only
And then there was Shiv who was seen with Madhvi when Madhvi said him to leave Sharanya Shiv repeated Sharanya dialogue 'Sharanya sirf meri h us ki har sans har dhadkan srf meri h'
Again there's Shayri of Shiv to Sharanya mai teri nabzz nabz something that is, if I am not forgetting, same as the one Sharanya had wrote in her diary!
Sharanya was surprised to know she used to write shayri but the fact was she never wrote shayri it was Her Shiv shayri that she had protected with herself like her own!
So isn't thos indication Sharanya was much more obsessive than Shiv!
Shiv love her deeply he needed her deeply but she love her to the extent to stand by him and being with him that gave him power to return as ghost!