I don't like to talk to my dad at all and I guess it's because of thins he has done in the past. He left my mom when I got diagnosed with diabetes type one, when my brother was born, and a couple of times in between. Growing up my father was always traveling and I only saw him on he weekends, not until I was 6 did I get to see him more often. When my father came back after I was diagnosed, he would slap me for every little symptom I had, I was 3 at the time. Recently, my mother found a picture of my father with another woman and they decided they would file for a divorce as soon as my mom had enough money and this wasn't he first one he had cheated on her with another woman. My father spends the whole time on the computer or on the Xbox ad whenever I try to have a real talk he pushes me away or says something rude. He has caused me emotional distress for the past few years and I have no intentions of making amends to our relationship except if its to get him to stop being so cold and abusive towards my mom and me. Any ideas?

I'm not sure what kind of answer you're looking for, but it would appear that you want to sever ties with your father. You also don't mention how old you are. If you are a minor, the divorce agreement between your parents will probably stipulate what visitation rights your dad will have. If you're old enough in your state to have a say in that (in my state the judge will allow a child to speak for himself if s/he is 14 years old). If you're no longer a minor in your state, then it's completely up to you to decide what kind of relationship you will have with your father.

However it goes, I hope you find some solace in the decision. You can't "make" your father behave better. You can ask him, you can suggest family counseling (which is a good idea even after the divorce since there are always loose ends that need tying up), and you can tell him you won't see him if the behavior continues, but again, all of that depends on your age and the final decision of the judge in the divorce case.

Are you an adult? I did some sluthing and I think your birthday is 1987.
If you are an adult, I'm afraid there isn't much you can do, you cannot force him to be a father.

If I am wrong, I apologies, and you need to talk to your mother about this behavior. And tell the truth 100% about how you feel.

Good luck!