Guy issues and the problems with it

Holly

my Fiance' and I have been together almost 2 years and lately he is really mistreating me with everything... He used to do all the wonderful things a man should/wants to do as a man but for a while now everything is the opposite of positive... Anything his kids do wrong I'm the one to blame. I do something not in exact way he would do it I get blamed. I don't do something he wants me to do cause he said he will just do it I get blamed. I ask for anything even just a simple answer on something he calls and treats me like I'm stupid. The negativity goes on... I don't feel he wants to be with me anymore except to care for his kids that hate me and give him some ass when he wants it or a blow job. What do I do about him being nagative at me? I've told him how he makes me feel and he tells me to leave and never come back, that he doesn't love me anymore, that he should of never come to my home state and get me or even talk to me, etc... I love him like crazy but I am in deep depression over him being nagitive towards me and how I get no respect from him or his kids... Deep down in him I know he doesn't mean the nagitive things he says to me but when his blood pressure is slightly high he makes damn sure that I'm the reason and the one to blame even when I'm completely not the reason.... I have talked with him about seeing a doctor for his blood pressure and he won't go so that's out of the question... What do I do and not loose the real him that I fell love with and continue to put up with all the negative things and hate that he releases towards me?