4) You will have more help than you think
Not only are you not alone, but there is more help waiting for you than you think there is. There are countless books, sermons, blog posts, tweets, and other resources that talk about evangelism. But beyond that, you are surrounded by people who can help you as you work up the courage to begin those conversations with other students at your school who are in need of the life-changing love that Jesus offers.
I read a book recently by a man named Matthew Paul Turner called The Coffeehouse Gospel. It talks about how we can use our personal stories to tell others about Jesus, rather than just quoting Bible verses at them and walking away. You will probably have more success if you get to know people, listen to their stories, and share your own, rather than spewing those Bible verses and walking away when they shake their heads no. The verses are true, but if you don't show people that you love them and care deeply about them, they won't want to listen to you.
I don't think you necessarily need books to help you, though they can be a great resource. You can always talk to a pastor or mature believer at your church who can give you advice. If you ask them, I'm sure they'd be happy to tell you about their own struggles and victories. It's not all about the success stories - sometimes you can learn just as much from failure.