As a shy person also They are best thing I can suggest is to just relax and to not forcE it. Try not to worry to much or to over think your actions. No matter what you do or say they won't hold that one thing against you. They are just guys your liking then does not change them. They are still just people that want to have fun and enjoy your company. The more you force yourself the more anxious you will be. Just relax and do what what comes natural to you.