We all fall on hard times every now and then, and if you're lucky you might have a parent who's willing to support you through these rough patches. Ideally, it's part of the parent-kid relationship , and it doesn't automatically end once you're 18 years old. You might continue to need your parents, if not just emotionally. But like with anything, there is a line that you should be careful not to cross, on both sides of the equation. If you're the kid, you have to be careful that you're not taki…