If your plan is to settle in the UK you should consult with a lawyer who practices there on he best way for you to gain residence there. I am assuming neither you nor your fiancee is intending to relocate until you have finished school.
Samuel Ouya Maina, Esq. 415.391.6612 firstname.lastname@example.org Law Offices of S. Ouya Maina, PC 332 Pine Street, Suite 707 San Francisco, CA 94104
I need more information to be able to thoroughly answer the question, but there could be an issue of establishing nonimmigrant intent should your future wife decide to come to the United States for the purpose of getting married to you. Meaning they could question whether she was entering the U.S. as a visitor so she can get married to you and then apply for a Green Card inside the country. If you have no intention of living in the U.S. with her it may be best to get married in the UK. That said if you change your mind about where you intend to live there are multiple ways to get her a visa that will permit her to come to the country without the nonimmigrant intent issue becoming a problem. Call me to schedule a conference if you would like more information. 716-854-1541.