Finn, who doesn't realize the revelation he just dropped into Poe's lap, finds himself a little relieved and then subsequent guilt for said relief. "I don't want to suffocate you." Which is exactly what he'll do if Poe lets him stay.

"But I-... I don't mind bunking with you." He'll take the couch or something, but his smile should be enough to say that he wants this, too. Maybe, hopefully, that's not obligation coming from Poe. Hopefully, it's what he actually wants.