SAHM and Loneliness

I'm a stay at home mom for my 5 month old son. We wake up every morning at 7, get ready for the day and clean the house. He takes a nap at 9 and that's when I get myself ready. He wakes at 10 and everything we need to do around the house is already done, so we play and exercise. We eat, practice new tricks, and read too. If we have errands to run, we get those all done before Noon. Then we have until 7 PM until daddy gets home, so we cook dinner together to prepare for that. My husband then gets home and wants to relax, so we start our bedtime routine and prepare to start over. I'm lonely as hell. I love staying home with him but miss having adult conversations and real friends. How do you all avoid the loneliness?