Is my ex just being nice or is something there?

after 9 months she broke up with me about 3 months ago. We were really happy and in love when we first started dating but guess it got to serious after we broke up it was weird as i tried to convince her i loved. After we broke up she has ignored me and has been mean and just hasnt had anything to do with me. So i have tried to just ignore and well i havent really talked to her but called her yesterday to see if she wanted some items i had to sell and she sounded nice and i even stopped by her house for a bit. The thing is she wasnt mean to mean and bitchy just wondering what this could mean. thing is i still love her my hopes are kinda rising after she actually talked to me but im not sure what to do continue not to talk to her