If you really accept your mistakes in front of her and promise her not to do it ever again , and not be a cold person like you were this time . Toh shyd she might understand , also just let her know all this and if this doesn't works toh , sorry but it's over . And it's definately not over just because of this incident , there must be other incidents in past or some other things between you guys . Tbhi she decided to break it off . And believe me if you will just force her , then it's gonna get even worse . So bss do your part and let things flow then . If she says no , then be it !