I have bipolar disorder, which is a mental illness that causes periods of depression and mania.
I appreciate you sharing that with me. I realize it may affect how you live your life. I'm in social work and may have to deal with clients that may have that as part of their life, as well. Could you tell me more about it?
Sometimes when I am in my manic phases I feel abnormally energetic or irritable. 
That's great to know, so that I can have expectations and be able to react accordingly, and appropriately. What else would you feel comfortable sharing?
I also suffer from the periods of depression which includes a lot of crying and a negative outlook on my life. I generally think about how I am a terrible human being and that the world would be better off without me.
I see. Thank you for entrusting that information to me, and I'm sorry to hear some of the more negative qualities of what you go through. What do you wish more people would know?
Some environmental factors in my life include a history of child abuse, emotional, physical and sexual. 
I'm sorry, I meant more about the condition in general; I didn't mean for you to share something so personal. Thank you for that, though.
It's fine. Some other condition that accompanies my bipolar disorder is an anxiety disorder. I am constantly stressed out and worried about everything. I live my life on the edge constantly alert.
Thank you for opening up to me about this. I've found it very enlightening, and will try to use it in my practice going forward.