itsallyourfault;
Most certainly go for it.
As a girl shidduch dating for many years I have learned a lot. I have definitely made mistakes and maybe the one you are thinking of has too. As hard as it is for you to put yourself out there she may find it way to difficult to even broach the subject with anyone to even do something about it. Reach out to her; you may be pleasantly surprised.
I have had individuals, through a 3rd party and directly, ask again with various outcomes. I know of 2 people personally who are now happily married and sometimes it was becouse of a miscommunication on her, yours or a shadchan’s part, but not to a/o’s fault.
Good Luck.