The vast majority of people formerly addicted to alcohol have done just as you have, Serendipity. They are content and happy, and dealing with whatever their life brings to them without a formal program. No steps, no meetings. They gave it up, moved on from their drinking using days, and got on with their lives.
I am sober too, as you are, without AA. And I have 'bad days' from time to time, as you do, and meditate too. I also stay active in as many different ways as I can. I think this is what people who have never been addicts do to stay happy in their lives do also. It is part of practicing good mental hygiene.
I believe the motivation for your question has nothing to do with your own sobriety now, but you are confused by your 'friends in the fellowship'. They can only speak of what they know, and for them, steps and meetings are essential to their sobriety. They think that this is essential to everyone's sobriety. They are just trying to advise you the only way they know how.
Thank your friends for their well meaning advice. Maybe you feel you can accompany them to some meetings without risking your sobriety, you might find something you like and enjoy there.
You got sober and clean by believing in yourself, by believing in your ability to stay sober and do just as you have been doing for two and a half years. My hat is off to you. This is an achievement that is envied by every addict, former and present, and it should be respected. You are AWESOME! Onward with your badass self.