about "I am promising you."

Hi, everyone.

I heard I should not use the verb promise with the progressive tense. However, I have thought about the reason because the verb promise didn't seem a state verb to me. So, I presumably have supposed the prohibition of the use of the verb from the progressive tense is because promise imply sort of long activity in time. If it were so, I guess I could use the progressive tense with promise to mean you did not keep your promise like the follwing .

A : You did give the promise to me.
B : I did...
A: Then, why haven't you keep the promise still?
B: ....(silent)...
A : Were you promising that just for avoiding that moment?

I put the verb promise with the progressive tense in the last line. I wonder if it might make any sense.

Thanks a million in advance.