Sometimes "not right now" really does mean "not right now."
If you are a piano teacher (or something comparable), you've probably had some students quit for the summer or something and say "we can't really do lessons right now but we'll call you when we're ready to start up again." This is usually a nice way of saying "we don't want to have piano lessons anymore." I should know, I've said it to guy or two after less-than-amazing dates. I think it's a valid brush-off.
So usually when I hang up the phone or close the email after getting a message like that, I think "I'll never see them again." Almost always this is true.
But, amazingly, I've just gotten an email from a family who wanted to start up lessons again with me (and only me they said). Also amazingly, this is not the first time that's happened. Unfortunately I can't accommodate this family now, since I'm going to stop teaching at the end of June to get ready to go back to school. I'm going to try to do what I can to get this family to try another teacher. Hopefully they aren't as serious about having "only me" as a teacher as they were about actually getting in touch with me when they were ready to start lessons again.