Or, she simply likes him, you know, as a friend? Can be as simple as that. Only IliveForJuve can intepret the context or how she says it ( a "crush" or appriciating platonic friendship) or how often, but might be reading too much into it anyways. Would be weird if the female friends I known for long time, mentionned me to their boyfriends, and they reacted like the above.