J.C.
No, you're not being ridiculous. My 7 year old played with friends 3 or 4 times this summer. Some of my other friends had playdates or activities scheduled for their kids practically every day of the summer. I really don't understand this but then realized they are the parents who constantly over-schedule their kids throughout the entire year. I also have a two year old, and am pregnant and pretty tired. The three of us did lots of things together...including playing at home.
I did mention to another mom that I wanted to set up a playdate, but I never got around to it. I saw her once school started and just quickly apologized, and we both just mentioned how busy everyone gets. I don't think she thought anything of it.