My girlfriend seems to have no area for romance. Is there a way to break her out of this or no?

When it comes to romance, my girlfriend has no interest it seems like. I tried taking her to the beach one time at nite with the sound of the ocean and the moon glaring off the ocean. And it had no effect on her what so ever. And when I ask what she likes for romance she says she don't know and acts like there is nothing. Is there a way to break her from this or no? And I will add that she is a major tomboy!