Kendall Jenner and Devin Booker are dating, but they’re keeping their new relationship casual.“Kendall and Devin are seeing each other, but aren’t serious and are just having fun with each other,” a source exclusively tells Us Weekly. “It’s easy because they get along well and he also gets along great with her family.”The Keeping Up With the Kardashians star, 24, and Booker, 23, first sparked dating rumors in April when they were spotted on a road trip to Sedona, Arizona.