I’m too shy to kiss my boyfriend?

P̶o̶s̶i̶t̶i̶v̶i̶t̶y̶.

Okay I’m 15 and i am a very shy human being unless I’m with my friends. So I am dating this guy anddd he is my first boyfriend so I know it’s normal to be shy we had kissed but only like a small kiss on the lips. He has tried to kiss me and when I’m in the moment like I do feel like I want to kiss him but I just pull back like I am too shy I get nervous and I need advice! Has any of you gone through this? If yes what helped!