Need some encouragement..?

So this guy in my college class sits next to me everyday, and I was having trouble trying to start a conversation with him. We’ve talked briefly during class before, but today I finally just went for it and started a conversation with him at the end of class. However, now I’m totally freaking out! He was super nice, and I already think he is really cute, but now I am nervous to try and start another conversation with him. I am very insecure, so I have no idea where this confidence came from today. I don’t want to scare him away, but I have never started a conversation with a guy I have a crush on before.