Play along with it

Alex froze with panic, how the hell was he going to explain this, he would never live it down. He finally stammers out,

“Oh ummm ya m-my name is ummm Ella, i-its nice to m-meet you”

Alex cursed himself, what the hell was he doing.

“Well hi there, I’m Nathan, Alex’s roommate” he takes a step closer, putting on a charming smile. “Is everything ok? Where’s Alex?” Taking another step closer.