 Although Lennon would lament this period publicly , he did not do so in private . Journalist Larry Kane , who befriended Lennon in 1964 , wrote a comprehensive biography of Lennon which detailed the " Lost Weekend " period . In the interview with Kane , Lennon explained his feelings about his time with Pang : " You know Larry , I may have been the happiest I 've ever been ... I loved this woman ( Pang ) , I made some beautiful music and I got so fucked up with booze and shit and whatever . " 
