Is my boss to scared to say it?

I want to improve at work and asked for feedback. my boss said he has thought about it and has nothing critical to say and im performing well.

We are fairly close (37 M, 32F) and I've always said i just want us to be honest with each other, which he agrees with.

he's very open but i kind of feel this is just rubbish and there is always something to improve on. Is he just too scared to actually tell me? I want to push more but dont want to seem annoying.

Is my boss to scared to say it?
Post Opinion