Why do we hurt eachother?

my man and i have been together 11 mon now and everything was great fo a while. 9 mon into our love fest things got ruff, thry stl have not gotten anybetter, he says its me, i have been going through some things and it affects us so much. i try really i do..nut he yells at me a lot and tells me b*&^%. i sometimes cant help it..why is this happing and what can i do to help us fall back in love