Hit It down the road months later

When you get a female's number and she doesn't communicate as much or not at all, do you just forget about her or months down the line, you reconnect with her and she says that months ago wasn't the right time? Ya'll believe in this "it wasn't the right time" thing? Did this work for ya'll when you kept chick's number and when ya'll spoke again, you end up hittin' it?