Article continues below advertisementHarry Styles has left his inner circle "stunned" with news of his apparent engagement to Zoë Kravitz, with friends telling OK! they are convinced the singer has finally found lasting love after years of high-profile relationships.Singer Styles, 32, is said to have proposed to Kravitz, 37, following an eight-month relationship, which started last summer, after the couple was first linked in Italy and later photographed together in New York City.