Heartbreak inspired her album '19'
According to author Marc Shapiro, who has written the unofficial book, ‘Adele: The Biography’, the singer professed her love for the unidentified man, who then ran off with one of her gay friends four hours later.
Shapiro writes: ‘One thing we know… Is that it was a first love gone terribly bad.
‘Adele had professed her love and he did the same, she had known he was bisexual but, in the rush of romance, felt they could make it work
‘Four hours after laying their emotional cards on the table, the boy ran off with one of Adele's gay friends!’
Although the singer and the man subsequently tried to make the relationship work, Adele dumped him after four months when he cheated on her.
On her official website the 24-year-old singer refers to the incident, writing: ‘My debut album is about being between 18 and 19; about love.
‘Daydreamer' is about this boy I was in love with, like proper in love with, he was bi and I couldn’t deal with that.
‘All the things I wanted from my boyfriend, he was never going to be, I get really jealous anyway, so I couldn’t fight with girls and boys. ‘
Unofficial biographer Shapiro also reveals that Adele’s father was a chronic alcoholic and says that despite a good relationship with her mother, the singer was always looking to find the affection she never received from her father.
He told ‘In Touch Weekly’: 'She loved the drama surrounding boys who treated her badly.’
The book also claims that the singer sought refuge in alcohol herself when her relationship with the bisexual man failed with Adele confessing to a particular incident at a concert where she became so intoxicated she fell off a bar stool.
According to the book, she says: 'I got so drunk by the time I went on at 2am I had forgotten the words to my own songs.
It was the worst thing ever.'
‘Adele: The Biography’ is published on July 17.