Ambivalence
WordNet
noun
(1) Mixed feelings or emotions
WiktionaryText
Noun
- The coexistence of opposing attitudes or feelings (such as love and hate) towards a person, object or idea.
- A state of uncertainty or indecisiveness.
Usage notes
This word is often used as to express a lack of concern about the outcome of a choice to be made http://www.google.com.au/search?sourceid=navclient&ie=UTF-8&rls=GGLJ,GGLJ:2006-10,GGLJ:en&q=ambivalent+to+mean+indifferent. In this case, a more appropriate word to use is indifference. The confusion is probably caused by the similarity of sounds between the two words and the passive sound of the word.