I believe her telling you is a test for you on your reaction. Some of the more experienced would have to say more about it. I don't believe she is interested in this guy because she told you about him.
I think she is trying to make you think something that is not.
My 2cents

M 43 W 43
S15 S 12 D 10
ILYBNILWY ( Dec 2009)
Sleeping separate rooms April 8 2010.
Sep as of 07/14/2010
W moving out 07/31/2010
No OM confirmed ( yet)