The "Thinking Out Loud" hitmaker, 24, is believed to be romancing 23-year-old Seaborn, who was a year below him at Thomas Mills High School in Framlingham, Suffolk, and their former classmates are unsurprised by the blossoming relationship, reported Female First.
A former school friend of the singer said, "There was always something there between them. Ed had a crush on Cherry at school, but she had a boyfriend then. I don't think Ed wants to date another celebrity again, having been burnt too many times and Cherry is definitely his type."
"I wouldn't like to say if they're dating. They don't tell parents these things, but they were very good school friends," she said.
The duo fuelled rumours they were dating earlier this month after they were spotted at a baseball game at Citi Field in New York City, where the New York Mets beat the Philadelphia Phillies.
The sporting date came a few days after they were seen leaving a New York hotel together. Seaborn currently attends Duke University in New York and is an accomplished hockey player.