It sounds to me your controlling, you cant tell another person what to do, also you wont buy her back ,especially if you have been aggresive in the past. I suggest you carry on with your anger management course but do it for yourself and not for her. If you do love her you will let her breath, if you give her space to breath she might realise that she misses you after all 6 years is along time. You should also ask her how long shes been feeling like this. also never beg and grovel women like to see their men strong with repsect , but its ok to cry in front of her. GOOD LUCK