RELATIONSHIP HELP PLEASE!!?

I posted on the website twice before but I really need help I am trying to get both sides across. My girlfriend hasnt got close to me in months and its because of my "violence" but I have changed at times before and she still wont get close to me, I feel sometimes I be violent these days because i'm so angry that my girlfriend won't get close to me but she claims she needs a long time for me to not do it to get close to me again?and she can't let her guard down NEED HELP LONG ANSWERS PLEASE!!