How can I stop being nervous and quiet around my BF?

Fart in front of him. Everything else should be a cake walk haha. But for real. What is it that brought you two together? Is there anything you have in common with him? Sports, cars, politics, religion? Start with the basics. Pick something you like. Say music. Ask him if he likes a particular artist you like. Food. See if you have the same tastes. It sounds like you've just met him not too long ago and can't seem to find the words to say 'cause you really like him, and you don't want to say the wrong things. Play it safe with what I just gave you. That will work your way to a more in depth conversation about what he thinks about life, and how it compares to your beliefs. Eventually. I mean you're not going to talk about where you go when you die by asking him if he likes Pizza. Hope this helps. Take care and good luck!