What is a good way to respond when a guy hints you to be his girlfriend?

[ji choi]

It would depend on what he had said, Make it somewhat similar to the way that he said that. This could bring joy, laughs and happiness ^_^. It also depends on how close you are with him

some other ways of saying it are
-If you want to do it on Facebook, change the status to married and choose him as the partner,, i guess you can also do this to check if he really likes you, if not you could just say that it was as a joke.

-Give him a couples ring and of course have one for yourself if he asks what its for then say something like its a trust ring o.- (wink)

-Another way is, the next time you see him hug him/embrace him with a big smile

Be sure not to ignore him or be mean to him as that is practically saying (I don't want to be too sad to you, your just not my type)