Really infatuated with this guy?

Some people especially younger people do this very thing, cut out the Facebook talk and get on the phone with him, when you are around him try and relax like you have known him your entire life, think of him as just a friend and not someone your looking for a future with it will make it easier, just be yourself, that's what guys like, they like to see you for who you are. You can do this. Good luck on your next hang out.