He has a GF that he hasn't been seen with for weeks. And they were holding hands and being all lovely with each other whenever they hang out (RiRi and Chris) LBR. They're back together. She even says in Cake "sweeter than a rice cake", which is throwing shade at his Asian GF.
The only reason why they haven't been together this long was because the public didn't allow it.
They're obvs screwing, LBR. They need to stop being so open about their love on twitter.