i like this guy but when i'm around him i freeze what can i do
First, you need to learn how to relax yourself and get comfortable around him. Think of something that you like or talk of something that you both enjoy to distract your mind. Focus your mind on him and think of what topic to start next.
Just try to take a deep breath and remember that he is just another guy and freezing up will just make things more difficult
put on a coat
Be friends with him.