Kanye West is still trying to win back his estranged wife, Kim Kardashian West, a source tells ET.Kim filed for divorce from Kanye in February, and while he briefly dated supermodel Irina Shayk, a source tells ET the 44-year-old rapper is spending more time with 40-year-old Kim and their four children — North, 8, Saint, 5, Chicago, 3, and Psalm, 2 — and that he wants her back.«Kim and Kanye's relationship is in a much healthier space,» the source says.