Loneliness is real when you're the stay-at-home dad

Been staying home with the kids for about 8 months now while my wife works and honestly I'm struggling. Most of the mom groups won't really include me, friends without kids don't understand why I can't just go out whenever, and my wife is exhausted when she gets home. I love my kids but some days I feel like I'm going crazy just being in the house. Anyone found good communities or ways to deal with this?