The word "indifferent" means to not care or to have no interest or preference in a certain situation or about a specific thing. It refers to a lack of feeling or concern towards something. Full definition
A straw man always gets thrown up when this subject comes up: It's unfair to rate teachers on the performance of indifferent or disadvantaged students. (wacharterschools.org)
If you come across as indifferent about the entire deal, the selling party has no idea if and when you are ready to walk away. (michaelshawnanderson.com)