Jesus never promised His followers that they would have it easy, or even that they would be in the majority. In fact, as a Christian you will often find yourself in the minority—as you do now.
But don't let that surprise you or discourage you! When Jesus died on the cross, most of His followers fled, and after His resurrection only a handful of disciples gathered to await the promised coming of the Spirit. But Jesus' final promise to them is just as valid today as when He first spoke it: "And surely I am with you always, to the very end of the age" (Matthew 28:20). You are never alone when you know Christ.
My first advice would be to take time each day to be with God. Even if it's only a few minutes at first, set aside a definite time in your schedule to pray and to spend time in God's Word, the Bible. The Bible says, "Above all else, guard your heart, for it is the wellspring of life" (Proverbs 4:23).
Then seek out other Christians. You need their fellowship—and they need yours. Most university campuses have Christian groups that are linked with others around the country; your pastor will know their names. They also can help you deal with some of the intellectual challenges you may be facing, and help you witness for Christ to those around you.