PERCY IS JUST A HOT MESS, OKAY?!
"We're okay," Percy replied, showing confidence. He needed to stop acting so foolish, or he was at risk of losing Oliver for good. Turning away and looking down at the pile of leaves he'd been raking, "It's just... my mind is disturbed. Pettigrew showing up made me remember things that I'd much rather forget. And then there's my mother returning, this time younger than even Ginny."
It was true, those things were also on his mind, so Percy used them to help make Oliver think that their relationship was the only thing bothering him.