Neil Patrick Harris doubts whether he would be able to reprise the role of Barney Stinson in ‘How I Met Your Father’. The 48-year-old actor played the character in the comedy ‘How I Met Your Mother’ between 2005 and 2014 but thinks that the return of his alter ego in the spin-off would be difficult because of his brash, womanising personality. Speaking to ‘How I Met Your Father’ star Hilary Duff in the latest edition of his newsletter ‘Wondercade’, Neil said: “As for coming on your show (insert joke here), I worry. “Barney’s antics, his overt delusions of grandeur, would likely get everyone in…