I and my gf had a break up we were together since 5months.?

i and my gf were goin on wel since 5months and recently had a break up as her mom told her tat she cant marry a boy of different caste.bcoz of this my gf tells me shes leaven me coz v both cant marry and wats the need of keepin this relation.i cried after my break up.its been 2months i stil cry many a times.shes not ready to be my frnd also wenever i msg her or contact her she gives bad words like *** off etc.shes angry on me dono y?her sis who used to help me had a fight wid her and now shes also angry on me.i want my gf back.but dono wat to do everybody tells to move on.i dono should i move on or wait for her.:( i really luv her..