I have lived at my residence in which I share an apartment, My roommate has been on a lease here for over 25years. I moved in around seven years ago. For reasons not important she wants me to leave... I said I was put on the lease or had a supplemental lease in my name... She said I don't... How can I find out if I am on a lease.. and if am not how do I fight to stay in apartment... since I believed even signed documents with previous manager... what are my recourses

You should be able to go to management and find out. :)

I don't want to pry or anything, but if you and your roommate are not getting along, it may be better if you do just move out. Its not fun living with someone you're not getting along with, trust me I know I've been there. :)