It looks like Ariana Grande is back together with a past ex. Following her breakup with Ethan Slater recently, Grande and her former boyfriend, Ricky Alvarez, are officially back together after weeks of rumors that the two were giving it another go, TMZ has learned. Sources close to the situation tell TMZ, Ariana and Ricky, who first dated in 2015 for about a year, are dating but TMZ was told they are taking things slow.