I think the advice you’re being given is good, but I want to add this caveat. Don’t assume this is a control issue. When I was a Witness and I noticed that someone I loved was not attending meetings or going out in the canvassing work, I made it a personal project to invite them out in the canvassing work myself. I laid the groundwork for this by visiting first and talking over different things we had done together, future prospects we had, what we might want to do in life. That broke the ice; and so when I invited them out and also said I would come by and pick them up, the invitation was usually accepted.
Then, while in the canvassing work, we could talk about what was bothering them. I did this with the people I loved the most and always had good results. My point is that your family may be expressing deep concern for your spiritual welfare. They may not be doing this in the most tactful way, but give them the benefit of the doubt.
On the other hand, they may well be drawing a line in the sand and transgressing personal boundaries. But they may also not be aware of this. Eventually, they will have to be told your feelings about the canvassing work. You can tell them directly now, or you might go canvassing with them and spill the beans then. Whatever you choose, I wish you all the best. But always remember, make it clear that your love for them is unconditional. In that way, the onus will be place where it belongs—on them. If any shunning is done, it will be on their part and not yours. In the meantime, as others have counseled you, find new friends.
Quendi
