Jarhead....if I read correctly....five months together - broke up four months ago because she thought you didn't love her - this means she broke up after one month (!!!) because you didn't love her??? The girl is crazy - you can't love someone after just one month together. Infatuation, certainly. But not love.
Forget about wondering how she may feel about you. Trying to understand why someone acts the way they do will just drive you crazy.
Instead, think about your needs from a relationship. Do you want a girlfriend who sees you more than once a month? Do you want a girlfriend who understands the difference between love and infatuation? Do you want a girlfriend who treats you as you want to be treated? If yes, then she's the wrong girl.
Never regret anything that has happened in your life. It cannot be changed, forgotten or undone. So, take it as a lesson learned and move on.