I don't think we know if there's any chance we might meet companions again. We couldn't in EA but I guess it could be possible in the release version. But I'd assume you've blown it with Gale this playthrough. If you do continue without reloading, then do let us know whether you happen to encounter him again later! I think we'd all be interested in the answer to your question.

"You may call it 'nonsense' if you like, but I've heard nonsense, compared with which that would be as sensible as a dictionary!"