I got a concerned for your life message a few days ago.
"Miss you guys. Not nagging, just saying. Can I help? Not nagging but when are you coming back? Not being pushy but I am worried about you. Don't disappear when we are so close. I too have been overwhelmed with life lately. We can help each other."
Not bad considering it's been 2 years since I stopped going.
Oh and I am not overwhelmed with life but I guess it's easier for them to think that.