Is it unacceptable? I can change it if need be. It's just that...I don't want them to beat around the bush. He's not asking her to be his girlfriend or anything; it's just that he's interested in her and wants to get to know her better. Instead of trying to do that covertly through complicated romantic shenanigans (i.e. the typical "will-they-or-won't-they?" dance), he's going the straightforward route and just straight-up asking her out.