Shakilus Townsend suffered a fatal stab wound to his liver
A 15-year-old girl was used as a "honey trap" to lure a boy to his death, a court has heard.
Shakilus Townsend, 16, was beaten and stabbed to death by members of a gang in Thornton Heath, south London in July last year, the Old Bailey was told.
The attack was allegedly orchestrated by the girl's 18-year-old boyfriend Danny McLean after he learnt she was cheating on him with Shakilus.
The girl, who cannot be named, and six male teenagers deny murder.
As Shakilus, from Deptford, south-east London, lay dying, he called out for his mother and said, "I don't want to die", the Old Bailey heard.
Brian Altman, QC, prosecuting, said Shakilus had been seeing the girl for six weeks.
He told the jury: "Shakilus had described her to his mother as 'beautiful' and he said to her that he was in love with her, he was even saying to his mother that he wanted to marry her, that she was his 'future wife'."
But she was still in love with Mr McLean, who had dumped her, and "would have done anything to get him back".
"He [Danny McLean] had come to learn of her deception and by way of recompense she agreed to set up the hapless Shakilus Townsend in a honey trap with a lethal and tragic twist."
On 3 July, she lured Shakilus to a cul-de-sac so he could be ambushed by the gang, Mr Altman said.
As the pair arrived in the area, the attackers were waiting for him, and chased him as the girl kept in touch with McLean by mobile phone.
He was kicked and punched and struck with a baseball bat.
Shakilus died the next day as a result of a wound to his chest, which had "raked" across his liver causing a massive loss of blood, the court heard.
Mr McLean, 18, and Tyrell Ellis, 19, both from Thornton Heath, and Andre Johnson-Haynes, who is 18 and from Croydon, south London, deny murder.
The girl, who is now 16, and three youths aged 17, have also pleaded not guilty to the charge.
The trial continues.