Kevin Costner is on the prowl! After his reported fling with Jewel appeared to fizzle out, a source claimed his friends are “arranging dates for him and setting him up” with single women. “He’s not quite as desperately pathetic as people think, he’s learned his lesson getting too carried away like he did with Jewel,” the insider spilled a news outlet. “He’s been on several dates with girls who are trusted and vetted by friends and having some good rebound fun.” The source emphasized that the Yellowstone alum’s social life is thriving again since his divorce from second wife Christine Baumgartn…