You can say "She spurned me", though that's typically a very conscious, deliberate, and negative action.
From Collins, for example:
spurn: to reject (a person or thing) with contempt
So you would not be uncertain if the woman spurned you (she would make sure of that).
For a more passive rejection, one where she simply isn't reflecting your affections, you can say "My love went unrequited", though that has the drawback about taking about your love as the object, rather than the woman or the relationship between the man and the woman.