C.P.
Awe...this is very sweet. :o)
As long as you remember that you are raising a child to be an adult, not a child to STAY a dependent child, you'll both be fine.
Talk to her. She's old enough to know how much you care for her well being and how it concerns you that she might be a little too attached when she needs to be getting out on her own a bit more.
Let her know that you'll always be there for her and never abandon her, and that you love her and miss her when she's not around too! I'm sure you can both work together to make these normal transistions easier on you both!
I'm VERY close to my mom too...but she was just a little clingy sometimes. It made me act out a bit after I left home. But now we are closer than ever. Don't worry that life will take her away from you...she loves you and you obviously love her. Keep the communication up and tell her how you feel! She's not a baby anymore.