confusion

I always do things i know i have no buisness doing and i make decisions about certain people when I already know the outcome will be negative. i wonder why I always do this to myself. As much as I have grown in the past year I still fall short to this particular situation. Everyone advises me to stay away but my curiosity the same one that killed the cat always gets the best of me. I really dislike this about my self and I have worked on it in the past and been great. But then this situation appears and I fall trap to it. Each time I fall into the hole a little bit less so maybe eventually I won't fall and at all. Or maybe I can just sit here typing all night then there will be no hole to fall into.