Is she just a stone hearted person?

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I have an ex-girlfriend way back before... She's just a simple girl and yet pretty of course... I have courted her for a months and soon we become girlfriend and boyfriend... But as in our relationship, she just let me do what i want for my life... No pressure to our relationship, but as in our relationship... I never heard her says she loves me, nor make me feel that i was important to her, nor tell me that I'm doing somethings in a wrong ways, and even she can't talk to me without her eyes staring at me... I made some situation that will caught his attention, as expected she doesn't mean for a care... She just simply, stay quite for a days... Damn I don't know what she really means with that? Her emotional stays strong to hide it from me... Doubts raises to my mind on what she feels towards me and that ruined our relationships... But still now, I still don't know why I still love her... But I do know that I happy when I see her, same filling when I was first fell in love with her... Can anyone help me out what to do? Should I still have make a move for another chance?