All of a sudden, my gurlfriend is giving me the cold shoulder.need help asap?

my gurlfriend has been giving be the cold shoulder all of a sudden out of no where for the last few days...maybe its cause im leaving for a iraqi tonight...dnt kno this has happen before where she completely ingorned me for like a month and cause of it i cheated on her ddnt mean to..she gave me the cold shoulder so i thought she ddnt want me in her life anymore and i step out...and she broke with me...now we back together and i havent cheated of even thought about cheating again i promised her i wont..but she giving me the cold shoulder i wanta put it all on cus im deploying tonight...but i dnt kno...its killing me...i love her so much that i cant sleep i cant eat unlesss we talk or see each other...now she dnt want talk to me or "too busy" ..she make more time for her friends than for her own gurlfriend...i need advice