Who is Arjun Kapoor referring to in his mysterious relationship tweet?

Arjun Kapoor

Now what is going on in Arjun Kapoor's mind? The actor recently tweeted, "Have u ever wondered how relationships change so quickly... almost over night... one minute it's all good & in the other it's a royal mess..."

Who is Arjun referring to?

Arjun Kapoor

The actor has been linked to his 'Tevar' co-star Sonakshi Sinha though he maintains she is only a neighbour with whom he hangs out.