Feeling frustrated and alone

My SO and I both work. I’m a nanny and he’s a welder so he does work a lot harder than I do. I’m with my son all day every day, 24/7. We cosleep as I EBF and he wakes up multiple times to nurse. I never ask for help at night. But last night I asked my SO to change my sons diaper and then just give him back to me. Of course my SO goes off the deep end saying how he’s never gonna be able to get sleep again and this and that. Does he have ANY clue what we mother’s do? ALL DAY AND NIGHT!? I’m so frustrated you guys. I feel like a single mother. I hate feeling like this because I truly love my boyfriend but this is getting so old. I shouldn’t have to beg him to be a father. I thought this was gonna be easier. I’m so sleep deprived and I feel like crying. I’m not sure why I’m typing this other than to vent and see if anyone on here is going through the same or has some advice. I know I need to eventually put baby boy in his crib but I don’t think he’s ready right now, as he still wakes up 4 times a night to nurse. I want to love being a mom but I’m getting no help at all. This makes me not ever wanna have another baby which is breaking my heart. Sorry for the rant.