I stay in shreveport and im 17 but mi boyfriend is going to b 22 in december 2010 is that illegal?

It depends on what the two of you are doing, how the law is enforced in Louisiana and how big of an issue your parents are willing to make of it. If sex is involved, and one of you is a minor, the greater the difference in your age, the more of a problem it will be. You are slightly under the legal limit and he's just above it. I suspect it would depend on your parents. If they go downtown and make a big issue of it, he can still be charged.