Wife just went back to work and I'm losing it

She's been home for parental leave (we have a 5 month old) and now she's back full-time. I'm doing the daycare pickup/dropoff thing, making dinner, handling bedtime solo most nights. It's not even that hard objectively but I feel SO ALONE. Like genuinely depressed. I miss talking to adults. I miss having an identity outside of "dad who needs to keep the kid alive." And then I feel guilty for feeling that way because my wife is stressed too and I'm supposed to be supportive. This is stupid but I needed to write it somewhere.