Confused and going mad

been in my relationship 9 years and just dont know wot to do for the best. my partner can be loving and affectionate and would do anything for me but the other side to him is one i hate. his temper is so bad when he loses it and sometimes i dont even know wot has caused him to be like that. he seems to turn into a monster shouting and swearing, threatening to sell the house or move out. last episode was particularly bad when he had his hand round my neck. must admit to goading him a bit as i just had enough of his threats. no excuse i know. now hes at his mums and i am just confused as to wot to do. i still love him to bits and miss him like hell. woz round last week telling me he loved me and he would do whatever he could to get help with his temper woz crying and begging me to give it one more try..thought my heart would break. . so do i give him one more chance or will he never change. when is enough,enough! feel like my head is going to explode with everything going on inside it.