How to handle quitting my job?

Im currently a student and work an on campus internship. This is a serious job with lots of responsibilities. When I agreed to accept the job I was told it’s a four semester commitment. At this point I had no intention to go abroad because I could not afford it. However recently my parents have found the funds in order to help me study abroad and this was something that was interesting and would benefit my life. This is a rare opportunity to do something amazing. I told my employer and he told me that I added an insane amount of work onto his plate and I’m making a bad decision. I feel really guilty and I’m not sure how to handle the situation