I too sabotage things in my life. It has happened in the workplace and with relationships.

In both cases it isn't an instant trigger rather coming after the build up of emotions.

In the example of work I force myself to perform at a high level - which I can't maintain. I am constantly afraid I will screw up or otherwise get into trouble. I will quit before I allow that to happen.

In the case of relationships I too am scared of being a screw up, cheated on, and unloved. I am constantly not trusting (out of past experiences) and convinced they will do something against me that I jump at any indication this may happen. Yes, I've been take advantage of and hurt in my relationships, but perhaps my problem is not giving them a chance. Perhaps the real problem is I feel I'm undeserving of happiness.

My bipolar I know comes into play. My sense of unworthiness is no doubt the source but I tend to have periods in my life of great irritability and impulsivity.

Does this sound familiar?