Is it normal I'm too shy to talk to anyone?

I have been shy since I was a child, and still shy as a young adult. Shyness is not a bad thing, but it can be difficult to deal with at times when you need to be heard. A portion of shyness is genetic, and a lot of it is most likely due to self-consciousness. For me, it is both. I still cannot even look at guys and talk to them as well as I talk to other girls.
That guy seems nice, so maybe you can try taking baby steps and greet him first one day. Then when you feel comfortable, you can take another step and ask him how he is doing or something related to the class like, "so how do you think you did on that test?" Also, if you are not comfortable asking questions during lecture, you can always ask your teacher when no one is around or through email; I do this a lot. I know it is hard, but keep trying :)