No, you shouldn't have to hide something like that. I'd rather be with somebody who's at the very least as smart as I am, if not significantly more so.
Maybe part of it is in the way you go about showing it. Maybe some guys feel that you're full of yourself if you go on about it too much? It might not be so much that you are smart at all, but rather a matter of arrogance. Not saying you are, but just a reason that seems a little more common.
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About suffering they were never wrong,
The Old Masters: how well they understood
Its human position; how it takes place
While someone else is eating or opening a window or
just walking dully along...