Hi Redbeard and welcome to the forum!
I'm fading too, and I also grew up a JW, and have always had really good friends in the org. My only friends, in fact, since I never was allowed as a child to have non-JW friends, and as an adult never had a need for non-JW friends. I had plenty of the JW-variety.
I think that it sounds like your fade is going well. If your mother doesn't attend many meetings, it may well be that she has doubts of her own that she's not ready to express yet... maybe not even to herself. Your JW friends sound like they are very liberal, and not afraid of being around you even if you do appear to be 'bad association.' These things are both unusual, and very good for you!
By all means, make yourself some worldly friends!! But if your JW friends are willing to remain your friends, I don't see why you would have to give them up. Except for the fact that you might have to watch what you say about the WTS around them, it seems like they think outside the WT box.
When I stopped attending meetings, my JW friends began to ignore me. Even my very best friend hardly spoke to me, although she admitted that she missed me terribly. But the last month or so, they have begun to drop by and call, and I guess we'll see where it leads. I've been out long enough now for them to see that I'm not a raving mad apostate who is trying to drag them out of their precious organization. Your friends, though, might just follow you out!
Good luck to you in your journey, whatever you decide to do!
GGG