Chetan Sheoran (21), a BTech student in Pune, stabbed Varsha Yadav (18) to death at GJUST campus in Hisar when she came out of her hostel to go home for holidays.
According to GJUST Vice-Chancellor M L Ranga, when Varsha came out of her hostel and was heading to board an auto- rickshaw, Chetan suddenly attacked her with a knife, slitting her throat.
The shrieks of the girl alerted the varsity security and they nabbed him and handed him over to the police.
In his first statement to the police he confessed to killing the girl, saying she "ruined my life". Chetan is a resident of Prem Nagar in Rohtak and is the son of an ex-serviceman, police.
SP B Satheesh said, "It was one-sided love and the boy was stalking the girl for quite some time. His frustration led to this ghastly crime."
They both got acquainted at a coaching centre in Kota where they were studying last year.
Chetan had developed feelings for the girl but when she did not respond to his overtures, he started stalking her, police said.
He had tried to meet her several times but she avoided him, police said.
The victim's parents reside merely 10 kms from the campus in the BSF colony but she was staying at the hostel to avoid confronting the stalker on way to the university, police said.
The girl's father Dharam Pal Yadav is a BSF personnel posted at its Hisar camp.