Welcome, Stimorol!
I've basically blocked all JW stuff from my life ever since i faded but I guess i need closure
I liked how you said this. I haven't always been successful in 'blocking' the JW stuff because my parents were JWs and my Father still is. The Internet and all the wonderful ex-JWs who have had the courage to come forward with the information that proves this 'religion' is not 'The Truth' helped me tremendously. I figure I won't have a chance at complete closure until my Dad passes away. He is the only one left of my immediate family that is a JW. I think your family is wise not to discuss religion. Thank you for sharing your thoughts with us.
Regarding 'disassociating' yourself, I would suggest that you do not do it formally with the JWs (in other words, do not write them a personal letter or tell any of the JWs verbally) as this will ultimately put pressure on your family to shun you. Do no give them any ammunition. It really is none of their business if you decide you no longer wish to be a JW. This is your personal decision.