Corinne Sullivan / Cosmopolitan: Here's Chase Stokes and Kelsea Ballerini's Relationship Timeline for Those Just Catching Up - It's official: These two are the cutest. 🥺 - Believe it or not, it's been over two years since Chase Stokes and Kelsea Ballerini first kicked off their relationship, and yep, the couple is still going strong as ever.