A source tells ET that Kourtney Kardashian and Travis Barker, who have been friends for years, are dating. The source adds that the ‘Keeping Up With the Kardashians’ star and the Blink-182 drummer live on the same block and their kids get along really well. Barker is dad to 17-year-old son Landon and 15-year-old daughter Alabama, whom he shares with ex-wife Shanna Moakler. Kardashian, meanwhile, is mom to 11-year-old son Mason, 8-year-old daughter Penelope and 6-year-old son Reign, whom she shares with ex Scott Disick.