He let's the subject of liquor go, he doesn't often drink to get drunk either, but there's just something off to him about drinking something which mimics the taste of a drink, but doesn't satisfy in the same way as the actual drink.

"Indeed. I've been here nearly seven months now, and yes these are my guest quarters. If you like I can ask the captain to let you room with me." He won't presume to just assume she'll want to room with him, thus the phrasing of the suggestion. He'd like it if she did, and given the matter of their apparent marriage in the future, he couldn't see why she'd refuse, but she was still her own person and thus deserved to have a say in the matter.