Hi InterestedOne,
I know the feeling well. Learning to be appropriately assertive yet not bossy will take me a lifetime, I think!
Your friend knows she is right (has "The Truth" ) and therefore whatever she tells you is beneficial and all you're allowed to do is agree. So she is on a win-win (either you agreed and her belief is validated, or she "gave a fine witness" but you couldn't accept it because Satan asserted his power).
So, see, you are not conversing or exchanging ideas. She'll put her biassed spin on whatever you say or do.
That leaves it up to you. Some possibilities:
1. Raise a question that the jw belief cannot answer (How can we know that Christ chose the org in 1916 or whenever is a good one) . Until she gives a definitive answer to whatever question you pose, just smile and remind "you know you haven't answered my question and that's why I think differently".
2. Counter a subject switch or "wise counsel" with a hurt, bewildered look and ask "Did I say that? How did you understand that from this?" "Could we get back to the point, please?"
She may still end the "friendship" or limit contact, and may still deduce that she was persecuted for her religion. Just remember - it wasn't a friendship; if she could say anything and you could not, you were being used. And that in jw-mode, there is no logic to anything she says or believes. None of this prevents you from enjoying life in your own way.
All the best, Retro