Kari, I had to do some digging via Google to find some answers to this one.
Ultimately, I'd say you should ask your state to be sure, but this is what I found in another discussion
"The Articles of Organization for an LLC normally designate all the trade names a company intends to use when conducting business -- so most likely, your articles listed at least two trade names, one with and one without the "LLC" designation. If not, you're probably still okay if the only difference between the legal and trade name (the name of your boutique) is the "LLC." If you want to be sure, however, your LLC can file an assumed name (dba) certificate with the county clerk in the county where the boutique is located and the trade name will be used
I hope this helps!