They're starting to plan my class's 45th reunion

. I sorta kinda wanted to go to the 40th, but just couldn't.
Do you stay in touch with any of your high school friends?
All of a sudden, everybody wants to be Facebook friends and "keep in touch". I know I sound bitter, but I can't help but think: My parents lived in the same house for thirty years after I graduated from high school, with the same phone number, and nobody tried to get in touch with me.
On the other hand, now we're older and wiser (?), and I think the "let's get together and catch up" is sincere. Just not sure how I feel about it.