Need advise on a marriage to a drug addict?

i need advise please i am maried to a drug addict , we have been togerther almost seven years and have a three yr old lovlely daughter together . our relationship has been up and down for a long time i have held on with every thing i have for a long time . we have been in and out of of homes and have even been homeless , we lived apart witch by the way my daughter think is normal in some sences , we have lost and started over again so many time and have even lived with family . i feel crazy because he is a manipulative man he tells me what i want to hear and i belive him ,weather it a lie or not we have been mean to each other he hit me across the face thrown things at me and even made me feel so so bad that i question my action . maybe there some thing im doing wrong . he has spent so much money including mine on his addiction .after being home less recently i have come to live at my sister house to try to make him realize what he is going to lose . but he dissapoint me again annd again but even still i hold out hope that it can work , that right people i still even though everything i been through want it to work , im so confused i have recently told him i was done and wanted a divorce but quickly retracted that statement after i saw how much i hurt his feeling even though i have my feeling and heart broken with false promise and lies i am worryed about hurting his felling crazy i know . i have a huge heart and love with my whole heart . so i see him yesterday on father day and i though it would be so great as he as not seen our child in a month and i saw the old mike but then i saw him with our daughter and it was good for a while but after he "became tired " it quickly changed for me i came back more confused then ever . i so badly want it to work for her because she love her dad so much weather he high or not she just says wake up dady .so any and all advise is welcomed please help me i know what i should do i just dont know if i can i dont like confertation or hurting people feeling . i just keep in the back of my mind it can work but i am losing hope of that by the way everyone in my life has seen what i tried to hide and all tell me to move on for me and bella so what is wrong with me ?