Is my ex having a change of heart?

after 9 months she broke up with me about 3 months ago she said it was to serious. We were really happy and in love when we first started dating but guess it got to serious as she put it after we broke up it was weird as i tried to convince her i loved her and tried to chase her. After we broke up she has ignored me and has been mean and just hasnt had anything to do with me which i found out it was on purpose cause she felt bad i still liked her. So i have tried to just ignore and well i havent really talked to her but called her the other day 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 to me as normal so 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 should i continue not to talk to her. I really want her back i just hate thinking about her with other guys. ive talked to people and they said to move on well i tried and it just doesnt seem to work. recently she contacted me to make sure how much she owed and to thank me