Boyfriend wants to go part time so he can spend more time with his friends??

Me and my boyfriend have been together for 3 years and have a 5 month old baby.

Now my maternity leave will be up in 3 months and we've been discussing who will go part time next year. He's planning to leave the job (We both work full time in the same field), but wants to go part time so he can spend more time with his friends while I work full time.

Am I the asshole for stating that it isn't easy being at home?

You barely have time to use the toilet and have to wolf all meals down in 2 minutes flat. Add that to the constant nappy changes and our little one isn't sleeping (He's hit a sleep regression), plus the fact that he wants something new to do every 5 minutes or he starts crying. I'm lucky if I manage to get dressed some days with him.

He's taking 2 weeks off when I return to work full time, but I'm worried he won't be able to cope. He gets frustrated and hands our son back to me after looking after him for an hour, (let alone a 12hr shift) and can't cope with the crying whatsoever. He just hands him to me to soothe him. He seems to think that looking after a baby is easy and he's going to be able to go out with his mates (all of whom are single and always drinking to get drunk. Which I don't think is appropriate to do with a young baby around. It isn't safe for him). I'm always encouraging him to have his mates round alcohol free, or to go out on his day off while I watch our son, but he refuses.

I love him and understand better than most how stressful our job is. I just don't know I explain this to him without sounding like an asshole. That he won't always be able to go out with his mates? That some days it will be really hard and you'll both be crying. But you'll always love every second of being with him. Things aren't the same after you have a baby...

Any advice would be great!