Most Helpful Girl
Tell her everything you love about her and take her on a romantic date. Not the movies
Most Helpful Guy
I know so much how you feel. There's good news and bad news. The good news is that you may stand a chance at it. I said a chance, not a guarantee. Give it some time. It'll suck so hard you'll want to die, but it's what's needed. If you rush this, it won't end well. When you can talk to her again, start from ground 0. I mean literally. You have to pretend that nothing ever happened, because what did, ended. Try to change what you think went wrong, and don't make the same mistakes. If she gives you another chance, you won't get a third. Good luck, man. My hopes are with you.