Am I wrong for feeling this way?

I've been dating my boyfriend almost 1.5 years. We moved in pretty fast together because it just felt right. I left my place to move in with him. I have a daughter and he has 2 kids from 2 different women. The 2nd child is from his marriage (they got divorced a year before we met). Anyways, I pretty much split half the bills with him. He does pay for more things though, like when we go out and stuff. He makes more than me but works long hours. I still work and pay bills too but I have to watch both his kids which are both on different schedules (he has 50/50 for both). Im the babysitter for the young one that still isn’t potty trained so I’ve been changing poop diapers for a year now (he’s autistic). And I’m the one who has to pick up his older daughter from school when we have her. Mind you, I also have my daughter to pick up from school also (different schools because of age difference). I was also the main one having to take them to their sport programs, etc. Because he’s always working. I’m also the one to cook, clean and do everyone’s laundry. He does try to help when he can. But honestly to me it doesn’t make much of a difference. Im exhausted and feel like I have no life while he just gets to work all day and night. We’re not married and don’t have kids together. I just don’t feel like I HAVE to take full on care for his kids. In my eyes, he shouldn’t have 50/50 then if he’s always working and clearly doesn’t have the time. I’m honestly exhausted. Blending family’s is already hard. His daughter hates my daughter already so I dread them being around eachother. And I feel exhausted still changing poop diapers for someone else’s kid. Yes, I decided to date someone with kids (which I’ve done before and my ex had 2 children too) but I NEVER felt like EVERYTHING was thrown on me. Like I’m guilt tripped into being a “goodpartner” and we’re supposed to be a “family”. Like at the end of the day they’re not my kids…

Am I wrong for feeling this way?
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