Oh my, serious relationship problems.

Apart of this was posted in the askcurezone forum. I was having problems with 2 "allied" coworkers who were giving me a hard time yet I was way more productive than they were. I'm alone in this with no support. They were not doing their job and I was stuck like chuck with all the rejected work and turning bitter and upset. I complained on them to no avail. Now I have resorted to doing what I do to everyone I have conflict with and that's giving them the silent treatment. I feel bad it has come to this. I stay out of their personal space. So when I was to pass something from work around I skipped over her and gave it to someone else. She got mad and said "I didn't know I was invisible."
I'm not sure why I give people this treatment but maybe it's a way of showing my anger or giving them a dose of their own treatment. My mother and I, for instance, had major conflicts and we haven't spoken in years and she lives an hour away. I know this is a pattern. So any good advice is welcome.