Scared to call him babe/baby

So any time I’m in a relationship I’m too nervous, shy, or just feel awkward whenever I try to call who I’m with names like that.

My SO calls me babe a lot and the feeling I get inside when I hear him say it is amazing.

And I want him to feel the same way

But saying “baby” or “babe” or “my love” etc is just so foreign to me

Why am I SO NERVOUS and SCARED to say one freaking word?