One

"Will Louis be there?"

"Harry, you ask that every time. Of course he is." Liam says through the phone, instantly making Harry sigh.

"Yeah, because every time I hope you're gonna say he's not. You could just not invite him." Harry says with a groan, sitting back on the sofa.

"Imagine if we didn't invite you."

"Fine. I'll come."

Or

Harry's ex boyfriend, Louis also happens to be in his friendship group.