I might have bipolar disorder. What are some symptoms of it and what do to get rid of the down side and keep the happy?

No luck charlie. Sorry every surfer must crash against the shore. The higher the highs, the lower the lows. They are part and parcel of the same disorder. Preventing the highs prevents the lows for the most part. As someone ages untreated the highs get fewer and the lows longer. This is why early treatment is so important. Good treatment keeps you happy but not high.