You didn't mention anything about mania, the key indicator of bipolar. From this site:

Three or more of the following symptoms must be present:

• Inflated self-esteem or grandiosity
• Decreased need for sleep (e.g., one feels rested after only 3 hours of sleep)
• More talkative than usual or pressure to keep talking
• Flight of ideas or subjective experience that thoughts are racing
• Attention is easily drawn to unimportant or irrelevant items
• Increase in goal-directed activity (either socially, at work or school, or sexually) or psychomotor agitation
• Excessive involvement in pleasurable activities that have a high potential for painful consequences (e.g., engaging in unrestrained buying sprees, sexual indiscretions, or foolish business investments)