My 24 year old son has been diagnosed as ADHD since preschool. I thought I has a handle on this until he hit the teen years and was diagnosed as comorbid with Bipolar. He celebrated his 16th bithday in the psychiatric hospital. Again I thought I understood this new twist and attended support groups. After trying to live on his own and not being too successful, he moved home and was doing great with a job, school, and a nice girlfriend. Three weeks ago he met a different girl , quit his job, and took off. He has called once and showed up here once. We have no idea where he is. Is this typical of bipolar young adults? He has stopped any meds and counseling once he reached 18. Any suggestions of how to respond when he does call or visit? I don't want to alienate him but don't want to act like everything is OK either. After all these years, I feel confused and worn out.