I don't want to be miserable all of my life..

Im miserable in my marriage. My husband and I fight and bicker almost everyday. We've had some infidelity issues (on his part and mine) here and there that we have worked through. Honestly I can't see myself being with him for the rest of my life. We have been married for 8 years and we got married when we were younger. He is a great guy and I believe I am a great woman but I just don't think we are meant to be. What's sad is Im pregnant with our 4th child. 😢 I love my children and I do love him I just don't want to be with him. We argue about the smallest to biggest things. I personally think he is incredibly lazy. Sometimes I work on Saturdays, I come home and he hasn't even washed a single dish. I can't live like that for the rest of my life. It's takes more than just love to make a marriage work. I doubt he is going to change because he hasn't this whole time. Im tired of telling a grown 31 year old to take out the trash and recyclables. Ugh. Just needed to vent. 😞😖😬🙈Im living with a male child. He isn't a go getter and isn't motivated to do anything. He does work full time but so do I. My mom says I should just be happy he works and is a good father. Yeah no I can't. I'm tired of being tired.