Well, if he’s up to the job and wants it, that’s one thing – but I don’t think he should feel obligated to help her through her problems. If he’s not ready to handle that sort of thing, they’ll both end up getting hurt. In any case, somebody who hasn’t really worked out whether or not she wants to have sex – or how to communicate her preferences to her partner – is probably better off with some alone-time. And it doesn’t sound as if they’re in a serious, committed relationship yet. If anything, I get the impression that she’s having doubts about whether she wants to be in a relationship at all.
So yes, I think it’s a good idea to keep things on a friendly-hanging-out level if they haven’t gone too far for that, and no, I’m not suggesting that he should drop her in a never-talk-to-her-again way. Sorry if that wasn’t entirely clear.