Hi Confused,
Love her and Love God and Jesus. Show her by living a balanced life...You can talk all you want but just show her that a person doesn't have to be a witness to show love and to be loved. Show her you have faith....do something for God that doesn't have to be counted...
You have come to the right place...many will share their experiences with you and give you encouragement...I'm a witness, and many of the friends have no idea that there are beautiful people that are not in the hall the love God/Jesus as much as they do. They claim they can't read hearts only God can, so how can any one judge ones relationship with God, just by looking at them...
This is scary for you depending on your age...If you are old enough to be on your own that's a good thing...I'm glad you mentioned that you were ready to face losing your witness family...that's brave and the first step to healing....Are they your family if you don't believe like they do? This is what keeps many in for the sake of the family. I was not born in so I can't understand that point of view....I have a good relationship with my Mom and she's not a witness. But that's another story...and a nice story...it's a story of respect.
If your mother really loves you, just live your life and be a good person, prove her wrong that because you are not a witness you are not going to live a crazy life...find a place of worship, that is non-denominational...and remember wherever you go, they won't have the whole truth, just like being in the org. you will hear and see things that aren't true...The Truth is in you.
There are many ways to show you love God/Jesus...and being a witness is not the only way....
If you keep peace in the house, that's ok, but you won't ever have any peace within yourself...
But first congrats. yourself on seeing the truth...and you are not spiritually weak....
You are correct in telling Mom don't tell your family....you don't need a bunch of folks blabbing in your ear...stand your ground...Live Well...Be Kind to others....
Tor