I can't access my important e-mail adress and can not remember one of the qustions is there a way to get it ba?

I've had the email adress amandac8508@yahoo.com since 2008 and I cannot remember the pword I also can't remember one of the questions to get my access back. I used a friends email account to start that one and I do not speak with her anymore. Is there anyway I can get access to that account. I have all my important emails going to that adress! Please Help!??!!?!?