mush,
it all depends on the girl and the guy. the girl need to be mature
enough to handle this and continue to accept the guy as a friend on
the basis that she has made known her stand clear to the guy.
as for the guy, he has to learn to manage his feelings and not
continue to pressurise the girl, at least he has to be able to make
the girl to be comfortable with him.
I admit that this is not easy for the guy but if he is able to do
so, I believe he will gain the respect of the girl and in life, we
tend to attract what we respect, not saying that the girl will
surely like the guy, just that if she does not, someone else better
will.