So I'm in high school, and I'm in a high level Spanish class because I'm fluent.  We just finished reading La Familia de Pascual Duarte (great book in any language) and we have spent months talking about how the hell that Pascual had to go through made him the disaster of a person he was.  The guy had a very similar upbringing to many of us, lots of abuse and a very hellish home life, which led to very unhealthy relationships with family and friends, ect.  He might even have BPD based on the way he thinks and acts and treats his family.  But that's not what the project is about.  Using our discussions about what made Pascual the way he is, we were tasked with giving a speech in Spanish on what made us who we are.  Parts of my life are well known throughout the school, and I have had arguably the most screwed up life to this point in the whole school, filled with abuse, death, abandonment, poverty, ect, and even though my class has a couple orphans and children of single parents and poverty, mine has been acknowledged as the most extreme.  My teacher told us not to hold anything at all back in what made us who we are, but I'm unsure of how deep I should go.  I don't want to get up there (I also have a fear of public speaking and had a stutter for a long time before getting help with a speech and theatre teacher)  and start getting into the major events of my life, my horrible childhood and the father that caused all of it, and the emotions that I feel as a result, how I've lost everyone close to me through death or abandonment, how fucked up I still am, ect.  I'm afraid that I'll get up there and start crying, because rehashing everything is not easy for me and it hurts to think about all the shit that has happened to me that has made me who I am.  I'm not even sure of who I am exactly.  I lack any sense of identity, I have to put up a facade to be able to hold myself together, and when that facade is broken, I am an absolute mess.  I also don't want to go up there and scare people who don't know just how bad things are with me.  Part of me wants to be completely honest and hold nothing back, because those shitty things that I've gone through have made me who I am, even if I don't know exactly who I am.  

What I'm asking you guys is how do you handle telling people what made you who you are, how would you approach the situation I'm in, and where do you think I should draw the line as to how far/deep I go in this speech.  Thank you for reading this, and thanks for any help you can provide.