In need of assistance

Hello… I have a question about my possibility of attending either Durham University or the University of San Francisco. As an upcoming Senior, I have taken no AP classes YET, and (unfortunately, this was so hard for me to write on here) I have to redo Sophomore Geometry for the FOURTH time. (First time (Sophomore) = Failed; Second time (Junior) = Passing 1st Semester but Lost Morale and Failed Second Semester; Third time = Failed in Summer School since I was too far behind) I have lost almost all of my confidence in my academics, I have developed a negative mindset that I’m stupid and can never be like others, and I am fearful that my dream of attending Durham or USF will never happen. I need help. It isn’t normal for a High School Senior to redo Geometry for the fourth time. Living with a family of overachievers in both academics and life, I’m often envious of others and in dire need of assistance. What can I do to improve my academics and make my dreams of attending Durham or USF a reality? (BTW sorry for kind of venting here it’s supposed to be professional, I know.)