HOw do you handle a chic that you like and is really nice to but its only FB? She knows the deal but I think she's looking at this as a challenge...
She makes me cookies, offers to do my laundry and is always tellin me how much she likes me, misses me, etc.

Should i just roll with it? Should i continue to tell her how I feel about things?

Roll with it bro, I had a girl at my college who did my laundry, my dishes, cooked dinner for me, cleaned my room, and was my fuck buddy. She cried one time when she found out that I was getting with other women but I just calmly explained the situation to her that I was young and didn't want to be stuck in a relationship but really enjoy spending time with her. She wound up not caring in the end and staying real close with me and continuing most of the things she did in the beginning. I guess its all situational though, she may grow very attached to you, but that doesn't mean you should cut it off now. You'll never know if you don't try. I'd try hinting to her that your not up for a relationship, and you just enjoy her company but also are interested in other girls and see how she takes it.