Those of us who are bipolar tend to be a little hard on ourselves. Not only do we have trouble with mood, but also with judgement. So, when we make a life changing decsion, we run through it in our mind a thousand times. Learn to let go. If you've made a decision, if you've quit a job or ended a relationship, don't dwell on it. Life is full of trial and error. Some decisions are good, others are bad, but how will we learn if we don't allow ourselves some room for mistakes.
Life is also full of second chances. Unless you commited a perminent act, such as murder, you can almost always go back and try again. More often than not though, going back is a mistake. I've stormed out of jobs, and regretted it. I've broken engagements with men I thought I loved. I've gone back, often years later to try to patch these relationships and try again. In a clear light and with stable mood, I saw that I had moved on, that those relationships were not right for me anymore. So, let go of regrets.
Our intense moods give us a bit of an advantage over stable people. We see things in full color, especially when we are depressed. If something looks good when we are depressed, then you betcha it's going to look fantastic when we are feeling fine. So give yourself a little credit. Forgive yourself. You are exactly where you are in life for a reason. You're life might be a bit of a bipolar roller coaster ride, but nobody can say that you didn't live it to the fullest.