If somebody can tell me the name for this problem, then I can google and possibly find some self-help books. I am seeing a therapist, but it isn't helping.

My problem is that I'm very rude and hateful to my brother - even though I have sacrificed and continue to sacrifice to try to make his life better. We are business partners, but I hate to even see him. I don't understand why I behave this way, and it defeats the purpose of trying to help my brother when I am constantly hateful to him reflexively.

So what is that problem called?