I am new, but i really need to know what i can do my heart is bleeding?

ok my gf of 7 years was d recently. about 5 days ago now... anyway, after it happened her sister called me and told me that my gf wont be coming home tonight, and that my gf is staying with her. i asked her why and she said that she needs to be alone for a while. so i was worried about her went to her sisters house, her husband was there, and he wouldnt tell me anything, my gf and her sister was not there, and my gf sisters husband said they went out. which got me mad. so i sat there and waited 4 hours and 53 minutes ti be on the dot here. and when she came back she was walking like she was drunk. and i called her a b word and a , and told her so u would rather be out getting drunk and partying instead of being with me. now mind u i was about 25 30 yards away from where she sister parked, and where i was sitting on the roof of my car. and when i said that my gf was not looking at me or paying attention. she was talking to the house, so i told her why the hell dont u just stay here i dont want you coming back over, she lived with me.. and then she plopped down on the ground and was crying, i told her that i was sorry and that i dont wnat her kicked out that i was mad. and as i got closer thats when i seen big bruses on her face. and she said that she will move out that it would be better, i asked her what happened. and she told me that she was d. i asked her where did you go how did u get d who. u know i was really shocked, and hurt i didnt think of my questions i tried to be there for her, after i found out what happened, she told me she needs to be alone so i offerd up the house to her but she wont want it cause she wants to be with her sister, she cane be around me yet. when will she come back to my i love her to deth, and i would do anything to take this pain from her. is anyone able to tell me what might help. i got her flowers. i get her a neckless, bracelet and so many thing that might make her selfworth come back up. but she wont even look into my eyes, usually when i get her gifts she would smile give me a hug and wed talk, now i give her something and she puts it next to her, and folds her arms over her knees and starts crying. and she is holding her head tilted so the bruse that is very visable at any angel she thinks i cant see, i dont tell her that they are very noticable, cause maybe she feels better doing that, i just want to tell her somehow that its ok to look in my eyes and tell me how she feels... ladies please tell me what i can do pleasee!!!! she is only 22 i am 25, she is to sweet of a person to have to feel like this, no wonam should ever be d. but why her i was going to ask her had in marraige on her birthday june the 7th. and i dont know now it wouldnt be right???