It is the girl's right to make a decision concerning her marriage, and her father or guardian is not permitted to override her objections or ignore her wishes. 
The Prophet (peace be on him) said, A woman who has been previously married has more right concerning her person than her guardian, and a virgin's consent must be asked about herself, her consent being her silence. (Reported by al-Bukhari and Muslim.) 
Ibn Majah and some other transmitters report the following hadith: A girl came to the Prophet (peace be on him) and informed him that her father had married her to her cousin against her wishes, whereupon the Prophet (peace be on him) allowed her to exercise her choice. She then said, 'I am reconciled to what my father did but I wanted to make it known to women that fathers have no say in this matter.'

The father of a girl must not delay marriage of his daughter if a proposal is received from a man of equal status who is of sound religion and character. The Prophet (peace be on him) said, "Three matters should not be delayed: salat when its time comes, burial when the funeral has arrived, and the marriage of a single woman when a man of equal status has proposed." (Reported by al-Tirmidhi.) 
He further said, "When someone with whose religion and character you are satisfied asks for your daughter in marriage, accede to his request. If you do not do so there will be corruption and great evil on the earth." (Reported by al-Tirmidhi.)