All perfect praise be to Allaah, The Lord of the Worlds. I testify that there is none worthy of worship except Allaah, and that Muhammad is His slave and Messenger.
First of all, may Allaah reward you for being keen to be kind and dutiful to your parents and avoid displeasing them, and for being keen to marry a religious person who has a good moral character. Indeed, a believing woman should be like this. We ask Allaah to bless you with a righteous husband who would be a comfort to your eyes.
It is an established fact among the jurists that the guardian has no right to refuse competent and suitable men who propose to marry the woman under his guardianship. The study is not a sound reason for refusing them, as it is not an obstacle to marriage in general.
Therefore, if this young man is religious and has a good moral character, you should try to convince your father to accept his marriage to you. You should supplicate Allaah to help you in this, as Allaah ordered us to supplicate Him and He promised us to answer our supplication; Allaah Says (what means): { And your Lord says, Call upon Me; I will respond to you.” Indeed, those who disdain My worship will enter Hell [rendered] contemptible.} [Quran 40:60]
Then, seek the help of some people who may influence your father. Also, it might be that if you indicate to your father to condition on the person who proposes to marry you that he must let you continue your studies after marriage, then this will help in convincing him. If the husband accepts such a condition, he is obliged to fulfill it as we clarified in Fatwa 131714.
However, if your guardian is not convinced to marry you off, and he has no sound reason for refusal, then he is objecting to your marriage without a sound reason. In this case, you have the right to take the matter to an authority which is specialized in looking into the affairs of the Muslims so that they would study your case and if it is confirmed that your father is objecting to your marriage without a sound reason, then they would marry you off or appoint someone to marry you off.
Finally, if marriage is not facilitated to you, then you should be patient and keen to do any good acts that would help you keep your chastity, like fasting, keeping company with righteous women and keeping away from all temptations.
We ask Allaah to grant you all good and success.
Allaah Knows best.