is there any chance again me and my girl friend unit for forever????

now this is the 6th time my girlfriend had left me, every time she leave she never says me a thing,this time she came back to me after a gap of one and half year and married saying me that her husband is not good and so she left him and wants to stay with me...just after a week of stay with me she left me with no reason....came back again after one month and then again went away untill now..everytime she comes to me i never scold or shout at her......i dodnt understand y she does that to me ...goes away comes back again..................plse suggest.