Starting fresh

Back in the day, I was a sex goddess! Wanting and willing to initiate all the time. Then my birthday happened, a month after I met my now Mr. Wonderful and to say I love sex with him is any understatement. Problem is, however, that for some reason I am petrified to start anything with him. I can kiss him, I can hug him. I cannot initiate with him. He's 2 years younger  and less experienced (but knows what he's doing) but I just can't. The only thing I can say is I feel like I'm afraid of ruining our relationship- how? Idk.  So, help? How do I get back to it?