Please assist me.

I recently started dating a girl I’ve had a crush on for a long time. Normally, I don’t consider myself an awkward person, but now I find myself feeling anxious about hugging and kissing her. I’m trying to understand why I feel this way. In my past relationships, I met my partners online and felt confident enough to be affectionate when we first met. However, this girl has been my best friend for nearly four years, and I wonder if that affects my nerves. I’m hoping to figure out why I feel so awkward and how I can overcome it.