How to know when you've stayed too long

I've been part of this parenting board in my home town since it began. I was introduced to it by a former acquaintance and it's been a big part of my life for the past almost 3 years. Well...the love is gone! It's time to leave this party. I'm a little sad, a little glad. I hold a management role on the board and I used to love it. But, in July they did some changes in administration and since then...well, not so much. It's no point sticking around and trying to change things...I don't care about it that much. I even thought I should say my peace about it, but I don't know if it's even worth it in the end. We just have different ideas about what's important. My kids are much bigger now and besides I belong to another playgroup that I actually really love and enjoy and causes me very little stress.
The main reason I think it's time to say goodbye is the leadership on the board. Their hearts are certainly in the right place, but I'm not your typical SAHM and I don't want to be. I don't want to sit around all day reading about other women's bullshit problems. I've got my own, baby! Also, I don't need or feel like being bothered. It's sort of like all things where alot of women are involved...and worst even. These women don't have much else going on, this has become their lives and jobs. Sad, but oh so true! So, I guess I answered my own question. I stayed too long.