Maria Nieves, could it be that you are a very sensitive person and and have very low self esteem ? about yourself ?
I do not mean to be provocative or upset you in any way ,however I think you are worrying far too much about how your actions will affect your bible Study conductor / mentor than you are about how this situation unfolds and affects your feelings and mentality .
You need to look after your own well being and other people will look after there own ,and they will do so ,sometimes at your expense .
Do not be duped ,JW`s have a goal of getting people baptised into there religion ,once they realise you are not going down that path they will drop you like a sack of potatoes, unless they think they can work on you to reel you in like a fish on a hook,
There friendship with you is conditional , once they realise you don`t want to be a JW they will drop you like a hot potatoe