I'm 5'7", and, yep, I'd do it without a second thought. Believe it or not, I actually prefer women to be taller than I am (not a fetish or a demand, just an unusual preference). I like this couple's look:
I'm in the minority, though, so your squeeze may not feel the same. Dudes on average aren't as hung up on height as women, but some guys feel too "emasculated" (for whatever ridiculous reason) by taller women to date them. If he's one of said guys, then I'd "uncrush" him, because the dude may be too superficial to bother with.
Also, if a taller girl were interested in me, I'd rather she just ask me what I think about dating a lengthier gal. There's no sense in keeping any uncertainty around.
I am a lot taller than my boyfriend I am Dutch and we are one of the tallest countries in the world. I am 178cm (5feet 8in) and I am the shortest girl of all my Dutch friends and pretty average overall. My Australian boyfriend is only 176cm and he's about average in his social group in aus.
I am 6'1 and have only went out with a small number of men taller than me. The rest were shorter than me. Each one of those men completely comfortable with it and were proud to be seen with me. But each man is different. Some men love being with taller women and some don't.