As you love her and want to spend the rest of your life with her, it is certainly worth trying to put it all behind you if you can. I suggest you tell her how much you love her and that you forgive her completely (100%). This is the only way it will work in my opinion. Obviously it will still play on your mind now and then but you'll have to learn to keep it under control. If you have an argument one day in the future don't throw this back in her face or it will probably split you up for good, as it will be obvious to her that she is not forgiven.
Good luck mate.
A4000 Mad