grumpy/ grouchy

[zhengl_2000]

which on is more popular in AE?
Is there any difference between these two?

Can I say:
My girlfriend is always grouchy with me in the morning since
she is not awake. ?

[MikeNewYork]

which on is more popular in AE?
Is there any difference between these two?

Can I say:
My girlfriend is always grouchy with me in the morning since
she is not awake. ?

I would say they have the same meaning and similar frequencies of use.

You can say what you wrote. The "with me" is not necessary.