Kanye West and Kim Kardashian's split may have been amicable, but it'll take some time for the 43-year-old rapper to «adjust.»A source tells ET, «Kanye is upset that he and Kim couldn’t work it out, but he knows the two tried very hard to make it work.»«Kanye will forever love Kim and is so thankful the two share incredible children together,» the source says, adding that while their marriage is over, «Kanye is thankful for Kim and everything she did for him throughout their relationship.