If you place some sodium fluoride in water, and boil it, do fluoride ions react with hydrogen to form hydrofluoric acid? (I believe they don't because if I place sodium chloride in wáter and boil it, vapor is pure water, and sodium chloride remains combined, until all water disappears and SALT is left, solid)

2NaF + H2O --> 2HF + Na2O
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This would be the ideal balanced equation that would yield hydrofluoric acid, but I said ideal, so I think you are right and all you would get is this..

Na^+ and F^- ions surrounded by water until the water evaporates.

Perhaps a chemist will come along with a definite answer.