When questioned about meetings I will tell them it is our persoal decision
Do they even know that you haven't been to meetings? If they know, you could say "Well, since you're the ones bringing this up, are you sure you are prepared to hear the honest answer to your question? Because if you don't want to hear it, then I suggest we change the subject."
If they don't know, they may not even bring it up.
In the case of my own JW relatives, they knew we weren't going to meetings, yet they never asked about it or even tried to encourage us to go back. Not once in over a decade. They just took it upon themselves to treat us as though we were DFd, even though we weren't.