Should I give it a last try at my ex girlfriend?

Its been almost a month since my ex girlfriend broke up with me.There was not a good enought reason for the break up i just found out that her ex girlfriend was talking to her and probably brain washed her. I've been missing her alot and have been feeling miserable eventhough i am angry for her brakin up with me for someone that has not done anything good for her while my only mistake was giving her to much love and doing everythin she asked of me just to please her..I feel betrayed by her..but i stll hear from her mother that she cries when she talks about me and looks sad even though she hides her feelings very well..I trully love this girl and need her back in my life even though she has hurted me i just want her back bcuz i saw her a as my future wife and i came to find joy in life bcuz of her and now she is gone and i am depressed and feeling Down most of the time..i am planing to go talk to her unannounced not to beg but to let her know how i feel