^^No outright confession. However...
Yumi pretty much spelled it out to Asuka during Estival Versus' Day 7 that Homura's attempts at riling up Asuka are Homura's way of saying that she loves Asuka.
Then in one of the DLC missions, Homura and Asuka have another back-and-forth banter where it devolves to Homura making a comment about Asuka loving her ass.