Why is it difficult for Emily to find a suitor when she is young?

It is difficult for Emily Grierson to have a suitor when she is young because she is too haughty and her father is so domineering.
The townspeople feel that the Griersons have held themselves "a little too high for what they really were." When young men have called on Miss Emily, none of them "were quite good enough to Miss Emily and such," and they were driven away by her father. Added to this repulsion of her suitors, the oppressive hold of patriarchal dominance is suggested in the portrait of Miss Emily and her father. In this picture, Miss Emily is in the background wearing white on her slender figure while Mr. Grierson is in the foreground with his back to his daughter. He clutches a horsewhip in his hand, an act that symbolizes his dominance and Emily's isolation. 
Even after he dies, Mr. Grierson dominates his daughter. When the ladies of the town call to extend their condolences, Miss Emily appears and calmly informs the ladies that her father is not dead. For three days, she continues to insist that he is alive, but finally, the physicians convince her that her father is, in fact, dead.