Reading between the lines...
check_mate_kid_uk: The answer here is simple...
By her saying to you that she has a bf after asking u who u fancy she is trying to get to your "jelousy" emotion.
1) She probably knows that a guy wants something he CANT have more than something he can have (phsycologically)
2) She wanted to see your reaction, but why would she want to see your reaction? BECAUSE SHE IS INTERESTED IN YOU. She just has a wierd way of showing it, and is affraid that u might not be interested in HER.
3) She doesnt want u to think "oh, she likes me cause she is asking me who i fancy" so she uses that to "cover up" that she really IS interested in you.
Overall, from what i gather, she IS interested in you.
Goodluck
